ttsnoop: resolve some compiler warnings

cde/programs/ttsnoop/messageProps_stubs.C.src

@@ -21,6 +21,7 @@
  *  ** DELETE THE GENERATED COMMENTS!                                 **
  */
 
+#include <stdint.h>
 #include <stdio.h>
 #include <Xm/Xm.h>
 #include "dtb_utils.h"
@@ -119,7 +120,7 @@ _DtTtMessageSetUpdating(
 )
 {
 	tt_message_user_set( msg, (int) (long) _DtTtMessageUpdating,
-			     (void *)updating );
+			     (void *) (intptr_t)updating );
 }
 
 typedef enum {