Replace X-allocation functions with their C89 counterparts

The only remaining X-functions used in server are XNF*, the rest is converted to
plain alloc/calloc/realloc/free/strdup.

X* functions are still exported from server and x* macros are still defined in
header file, so both ABI and API are not affected by this change.

Signed-off-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

Xi/gtmotion.c

@@ -154,7 +154,7 @@ ProcXGetDeviceMotionEvents(ClientPtr client)
 	WriteToClient(client, length * 4, (char *)coords);
     }
     if (coords)
-	xfree(coords);
+	free(coords);
     return Success;
 }