Use Xt memory allocation functions

Why do these even exist? I mean I guess there are some additions
compared to the standard ones but like why, why not just make
supplemental ones. Do these allocation functions do some wierd
different shit? What?

libXmd/include/Xmd/Buffer.h

@@ -1,7 +1,7 @@
 #ifndef _XmdBuffer_h
 #define _XmdBuffer_h
 
-#include <stddef.h>
+#include <X11/Intrinsic.h>
 
 /* Buffer is a struct that keeps track of a variable length array of data. It
    is like a piggy bank, you can add stuff to it and then break it to get access
@@ -10,7 +10,7 @@
 typedef struct _XmdBuffer XmdBuffer;
 
 /* XmdBufferNew creates a new buffer with the specified element size. */
-XmdBuffer *XmdBufferNew (size_t element);
+XmdBuffer *XmdBufferNew (Cardinal size);
 
 /* XmdBufferPush adds a new element to the buffer. */
 void XmdBufferPush (XmdBuffer *buffer, void *element);