Fix build against xorg-server >= 1.20.

Patch taken from upstream:
https://cgit.freedesktop.org/xorg/driver/xf86-video-savage/commit/?id=0ece556daa8a88771b669d8104396abd9166d2d0

diff --git a/src/savage_driver.c b/src/savage_driver.c
index 58a294d..3cda923 100644
--- a/src/savage_driver.c
+++ b/src/savage_driver.c
@@ -2034,8 +2034,6 @@ static Bool SavagePreInit(ScrnInfoPtr pScrn, int flags)
     xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Detected current MCLK value of %1.3f MHz\n",
 	       mclk / 1000.0);
 
-    pScrn->maxHValue = 2048 << 3;	/* 11 bits of h_total 8-pixel units */
-    pScrn->maxVValue = 2048;		/* 11 bits of v_total */
     pScrn->virtualX = pScrn->display->virtualX;
     pScrn->virtualY = pScrn->display->virtualY;
 
@@ -3637,6 +3635,14 @@ static ModeStatus SavageValidMode(SCRN_ARG_TYPE arg, DisplayModePtr pMode,
        (pMode->VDisplay > psav->PanelY)))
 	    return MODE_PANEL;
 
+    /* 11 bits of h_total 8-pixel units */
+    if (pMode->HTotal > (2048 << 3))
+	return MODE_BAD_HVALUE;
+
+    /* 11 bits of v_total */
+    if (pMode->VTotal > 2048)
+	return MODE_BAD_VVALUE;
+
     if (psav->UseBIOS) {
 	refresh = SavageGetRefresh(pMode);
         return (SavageMatchBiosMode(pScrn,pMode->HDisplay,
/tests/mail.scm?showmsg=1'>log</a><a href='/guix/tree/gnu/tests/mail.scm?id=104151f4f45f4bc3a816e3ad42256452932e0d8d'>tree</a><a href='/guix/commit/gnu/tests/mail.scm?id=104151f4f45f4bc3a816e3ad42256452932e0d8d'>commit</a><a href='/guix/diff/gnu/tests/mail.scm?id=104151f4f45f4bc3a816e3ad42256452932e0d8d'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/tests/mail.scm'>
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<div class='path'>path: <a href='/guix/log/?id=104151f4f45f4bc3a816e3ad42256452932e0d8d&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=104151f4f45f4bc3a816e3ad42256452932e0d8d&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/tests?id=104151f4f45f4bc3a816e3ad42256452932e0d8d&amp;showmsg=1'>tests</a>/<a href='/guix/log/gnu/tests/mail.scm?id=104151f4f45f4bc3a816e3ad42256452932e0d8d&amp;showmsg=1'>mail.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/tests/mail.scm?id=104151f4f45f4bc3a816e3ad42256452932e0d8d'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2020-11-05 16:13:50 +0100'>2020-11-05</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=a4e7749e91c5ed9b96117e3bcda8802e8744841e'>services: Remove imports of (ice-9 …) modules.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/services/monitoring.scm (zabbix-server-activation): Remove (ice-9
rdelim) from the imported modules.
(zabbix-agent-activation): Likewise.
* gnu/tests/mail.scm (run-exim-test)[test]: Remove (ice-9 ftw) from the
imported modules.


</td></tr>
<tr class='logheader'><td><span title='2020-03-16 14:05:52 +0100'>2020-03-16</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=a37e03d60e18dfcf119d0b92d9008e54fc350bf1'>tests: opensmtpd: Check /var/spool/mail instead of /var/mail.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
The test had been failing since the upgrade to 6.6.3p1 in commit
2dbfd8eec43b602d23cee3fdd2842cc333e36c24.

* gnu/services/mail.scm (opensmtpd-activation): Create /var/spool/mail.
* gnu/tests/mail.scm (run-opensmtpd-test): Check /var/spool/mail instead
of /var/mail.


</td></tr>
<tr class='logheader'><td><span title='2020-03-16 14:05:52 +0100'>2020-03-16</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=c215d9ec1ce108844b14c0c2952199a0da5f4176'>tests: opensmtpd: Gracefully handle test failure.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Previously the 'wait' loop would run for ~1024 seconds, at which point
we'd reach the file descriptor limit due to the leak in 'queue-empty?'.

* gnu/tests/mail.scm (run-opensmtpd-test)[test]("mail arrived"): In
'queue-empty?', close PIPE to avoid file descriptor leak.  In 'wait'
loop, arrange to run at most 20 times.


</td></tr>
<tr class='logheader'><td><span title='2020-03-09 23:46:36 +0100'>2020-03-09</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=827abd5deb87c1ec15112d7cde1a03a4ba4b4983'>tests: getmail: Provide a pre-initialized user account password.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/tests/mail.scm (%getmail-os): Rewrite so that the "alice" account
has a password.
(run-getmail-test)[test]("set password for alice"): Remove.  This would
not work since commit 8b9cad01e9619f53dc5a65892ca6a09ca5de3447 since
'passwd' would no longer be in $PATH.


</td></tr>
<tr class='logheader'><td><span title='2020-01-31 00:42:48 +0100'>2020-01-31</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=c3f146e79aca0efec5c0cbbf4e39c79e09268c15'>gnu: Update opensmtpd configuration grammar.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This follows up on commit 0d486909083c98d7c75cdfc027f89e69f9bf8f48.

* gnu/services/mail.scm (%default-opensmtpd-config-file): Adapt to ‘new’
≥6.4 grammar.
* gnu/tests/mail.scm (%opensmtpd-os): Likewise.


</td></tr>
<tr class='logheader'><td><span title='2020-01-20 19:13:17 +0000'>2020-01-20</span></td><td class='logsubject'><a href='/guix/commit/gnu/tests/mail.scm?id=b3e28b5ef5e23e564eeac8823ad2c837f7c40650'>tests: mail: Remove %getmail-os from the bottom of the file.</a></td><td>Christopher Baines</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This was left over when debugging the system test.

* gnu/tests/mail.scm: Remove %getmail-os from the bottom of the file.


</td></tr>