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/getdctl.c

@@ -281,7 +281,7 @@ ProcXGetDeviceControl(ClientPtr client)
 	return BadValue;
     }
 
-    buf = (char *)xalloc(total_length);
+    buf = (char *)malloc(total_length);
     if (!buf)
 	return BadAlloc;
     savbuf = buf;
@@ -309,6 +309,6 @@ ProcXGetDeviceControl(ClientPtr client)
     rep.length = bytes_to_int32(total_length);
     WriteReplyToClient(client, sizeof(xGetDeviceControlReply), &rep);
     WriteToClient(client, total_length, savbuf);
-    xfree(savbuf);
+    free(savbuf);
     return Success;
 }