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='2022-05-31 14:54:13 -0400'>2022-05-31</span></td><td><a href='/guix/commit/gnu/packages/openbox.scm?id=f451a8e80cf8d2da08bb65c4c07e3d41d7a17e58'>gnu: openbox: Patch for Python 3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/patches/openbox-python3.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/openbox.scm (openbox)[source]: Apply it.
[arguments]: New field.
[propagated-inputs]: Replace python2-pyxdg with python-pyxdg.
[native-inputs]: Replace python-2 with python-wrapper.
Add autoconf, automake, gettext-minimal and libtool.
</span></span></td><td>Maxim Cournoyer</td></tr>