Make libXmx compile without warnings

Aparently it was sufficient to include some headers and fix one type signature.

libXmx/Xmx.c

@@ -51,6 +51,11 @@
  * Comments and questions are welcome and can be sent to                    *
  * mosaic-x@ncsa.uiuc.edu.                                                  *
  ****************************************************************************/
+
+#include <stdint.h>
+
+#include <Xm/RepType.h>
+
 #include "../config.h"
 #include "XmxP.h"
 
@@ -134,8 +139,8 @@ XmxExtractToken (int cd)
 /* This function should be called by every Xmx routine
    when registering a callback or event handler. */
 /* This is PRIVATE but accessible to Xmx2.c also. */
-int
-_XmxMakeClientData (int token)
+uintptr_t
+_XmxMakeClientData (uintptr_t token)
 {
   if (Xmx_uniqid_has_been_set)
     return ((Xmx_uniqid << 16) | token);

libXmx/Xmx2.c

@@ -51,6 +51,8 @@
  * Comments and questions are welcome and can be sent to                    *
  * mosaic-x@ncsa.uiuc.edu.                                                  *
  ****************************************************************************/
+#include <stdlib.h>
+
 #include "../config.h"
 #include "XmxP.h"
 

libXmx/XmxP.h

@@ -57,6 +57,8 @@
 
 /* System includes. */
 
+#include <stdint.h>
+
 /* Here are some nasty ifdef's to make SGI's weird header files happy -DXP */
 
 #ifdef __sgi
@@ -132,7 +134,7 @@
 #endif /* if 0 */
 
 /* Prototypes for internal routines found in Xmx.c. */
-extern int _XmxMakeClientData (int);
+extern uintptr_t _XmxMakeClientData (uintptr_t);
 
 /* Marc's defines. */
 #undef  private