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>

dbe/midbe.c

@@ -100,7 +100,7 @@ miDbeGetVisualInfo(ScreenPtr pScreen, XdbeScreenVisualInfo *pScrVisInfo)
     }
 
     /* Allocate an array of XdbeVisualInfo items. */
-    if (!(visInfo = (XdbeVisualInfo *)xalloc(count * sizeof(XdbeVisualInfo))))
+    if (!(visInfo = (XdbeVisualInfo *)malloc(count * sizeof(XdbeVisualInfo))))
     {
         return(FALSE); /* memory alloc failure */
     }