Without <limits.h>, INT_MAX is not defined.

diff --git a/transport.hxx b/transport.hxx
index 35a57a7..838add6 100644
--- a/transport.hxx
+++ b/transport.hxx
@@ -11,6 +11,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <limits.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
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<tr><td><span title='2019-08-26 05:02:51 +0200'>2019-08-26</span></td><td><a href='/guix/commit/gnu/packages/gsasl.scm?id=9b9086ea82f8890f0cb228e1dca2fc16f8a56421'>gnu: rmlint: Update to 2.9.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/disk.scm (rmlint): Update to 2.9.0.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-08-28 22:31:00 +0200'>2018-08-28</span></td><td><a href='/guix/commit/gnu/packages/gsasl.scm?id=4fca5a44f6eda4a0f623a9f61a96df0c2655ef38'>gnu: libntlm: Update to 1.5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/gsasl.scm (libntlm): Update to 1.5.
[source]: Use HTTPS.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-02-16 13:14:26 -0500'>2018-02-16</span></td><td><a href='/guix/commit/gnu/packages/gsasl.scm?id=150062f19060687dbf8e2cbe6a22c2f8600e7c4e'>Merge branch 'master' into core-updates</a></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2018-02-16 11:11:40 +0100'>2018-02-16</span></td><td><a href='/guix/commit/gnu/packages/gsasl.scm?id=340978d7b054dcde6c3334267b40a8293eb0ce85'>gnu: Use HTTPS for supported nongnu.org home pages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/acl.scm (acl)[home-page]: Use HTTPS.
* gnu/packages/admin.scm (dmidecode)[home-page]: Likewise.
* gnu/packages/attr.scm (attr)[home-page]: Likewise.
* gnu/packages/audio.scm (lash)[home-page]: Likewise.
* gnu/packages/avr.scm (avr-libc)[home-page]: Likewise.
* gnu/packages/backup.scm (rdiff-backup, libchop)[home-page]: Likewise.
* gnu/packages/compression.scm (fastjar, lzip, lziprecover, atool)
(lunzip, clzip, lzlib, plzip)[home-page]: Likewise.
* gnu/packages/emacs.scm (geiser, bbdb, m17n-lib, m17n-lib)[home-page]:
Likewise.
* gnu/packages/flashing-tools.scm (avrdude)[home-page]: Likewise.
* gnu/packages/fontutils.scm (libotf)[home-page]: Likewise.
* gnu/packages/game-development.scm (gzochi)[home-page]: Likewise.
* gnu/packages/games.scm (enigma)[home-page]: Likewise.
* gnu/packages/gsasl.scm (libntlm)[home-page]: Likewise.
* gnu/packages/gtk.scm (guile-cairo)[home-page]: Likewise.
* gnu/packages/guile.scm (guile-reader, guile-lib, guile-json)
(guile-redis, g-wrap)[home-page]: Likewise.
* gnu/packages/libunwind.scm (libunwind)[home-page]: Likewise.
* gnu/packages/lout.scm (lout)[home-page]: Likewise.
* gnu/packages/mpd.scm (sonata)[home-page]: Likewise.
* gnu/packages/networking.scm (quagga)[home-page]: Likewise.
* gnu/packages/ratpoison.scm (ratpoison)[home-page]: Likewise.
* gnu/packages/skribilo.scm (skribilo)[home-page]: Likewise.
* gnu/packages/telephony.scm (exosip)[home-page]: Likewise.
* gnu/packages/texinfo.scm (texi2html)[home-page]: Likewise.
* gnu/packages/xdisorg.scm (xbindkeys)[home-page]: Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>