Fixing other sources needing <limits.h>.

src/pdu.c

@@ -12,7 +12,10 @@
 # include <assert.h>
 #endif
 
+#if defined(HAVE_LIMITS_H)
 #include <limits.h>
+#endif
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>

src/uri.c

@@ -12,6 +12,10 @@
 # include <assert.h>
 #endif
 
+#if defined(HAVE_LIMITS_H)
+#include <limits.h>
+#endif
+
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>