Removes references to mibstore.h and miInitializeBackingStore, which
have been removed from xorg-server.  Zack Rusin <zackr@vmware.com>
wrote: "It was a noop for at least 5 years and it has been removed."
See: http://patches.openembedded.org/patch/46133/

--- xf86-video-tga-1.2.2/src/tga_accel.c.~1~	2012-07-15 23:54:04.000000000 -0400
+++ xf86-video-tga-1.2.2/src/tga_accel.c	2014-12-19 01:40:27.535913013 -0500
@@ -37,7 +37,6 @@
 #include "xf86cmap.h"
 #include "mipointer.h"
 
-#include "mibstore.h"
 #include "miline.h"
 
 #include "tga_regs.h"
--- xf86-video-tga-1.2.2/src/tga_driver.c.~1~	2012-07-15 23:54:28.000000000 -0400
+++ xf86-video-tga-1.2.2/src/tga_driver.c	2014-12-19 01:40:48.756018238 -0500
@@ -46,8 +46,6 @@
 
 /* software cursor */
 #include "mipointer.h"
-/* backing store */
-#include "mibstore.h"
 
 /*  #include "mibank.h" */
 /* colormap manipulation */
@@ -1451,7 +1449,6 @@
     
     fbPictureInit (pScreen, 0, 0);
     
-    miInitializeBackingStore(pScreen);
     xf86SetBackingStore(pScreen);
     xf86SetSilkenMouse(pScreen);
 
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<tr><td><span title='2018-01-04 21:21:04 -0500'>2018-01-04</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=247d23680a222bc5440dec7c3fe0d36ad463a121'>Merge branch 'master' into core-updates</a></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2018-01-04 12:44:03 -0500'>2018-01-04</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=def8a62f627d00503e1fb84ac335cfa3d95a0438'>gnu: file: Mention libmagic.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2017-10-01 22:16:22 +0300'>2017-10-01</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=64df08f0cfac8f7a329002afa3461fd62a4b229c'>Merge remote-tracking branch 'origin/master' into core-updates</a></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-09-06 08:48:52 +0300'>2017-09-06</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=8d988f3845ebab6e7a87904ecb888733265068d6'>gnu: file: Update to 5.32.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-09-05 23:04:05 +0300'>2017-09-05</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=f1597427f220b0799b9c8847768d2f5a93fe3730'>gnu: file: Fix CVE-2017-1000249.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-04-03 15:12:10 +0200'>2017-04-03</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=8c85cb1b9ff10de2df0f3395d0491c389b6596dd'>gnu: file: Update to 5.30.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2016-08-15 10:42:27 +0300'>2016-08-15</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=da931eee6014a4eaa59c1c513e24fa5045b5e188'>gnu: file: Update to 5.28.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2015-11-16 16:06:49 +0800'>2015-11-16</span></td><td><a href='/guix/commit/gnu/packages/file.scm?id=b85d0984105ccbc4842e57788be769deb23bbc1a'>gnu: file: Update to 5.25.</a><span class='msg-avail'>...</span></td><td>宋文武</td></tr>