Add missing #include

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@5454 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/vtc.h

@@ -28,6 +28,7 @@
  * $Id$
  */
 
+#include <limits.h>
 #include <pthread.h>
 #ifdef HAVE_PTHREAD_NP_H
 #include <pthread_np.h>