Fix gcc3 specific error. The diff is based on latest upstream change.

suggested by jsg@, tested on luna88k by me, ok by jsg@ and matthieu@

lib/libX11/src/util/makekeys.c

@@ -35,8 +35,10 @@ from The Open Group.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
 
-#include "../Xresinternal.h"
+typedef uint32_t Signature;
 
 #define KTNUM 4000