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='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/openkinect.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

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<tr><td><span title='2021-03-13 01:00:30 +0100'>2021-03-13</span></td><td><a href='/guix/commit/gnu/packages/openkinect.scm?id=4ddf56c1364f21f2407783242e2715a6be86c5b7'>gnu: libfreenect: Update to 0.6.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/openkinect.scm (libfreenect): Update to 0.6.2.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>