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>

hw/xquartz/GL/visualConfigs.c

@@ -115,7 +115,7 @@ __GLXconfig *__glXAquaCreateVisualConfigs(int *numConfigsPtr, int screenNumber)
     if(numConfigsPtr)
         *numConfigsPtr = numConfigs; 
     
-    visualConfigs = xcalloc(sizeof(*visualConfigs), numConfigs);
+    visualConfigs = calloc(sizeof(*visualConfigs), numConfigs);
     
     if(NULL == visualConfigs) {
         ErrorF("xcalloc failure when allocating visualConfigs\n");