xkb: Add XkbFreeRMLVOSet helper function.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Dan Nicholson <dbn.lists@gmail.com>

include/xkbsrv.h

@@ -858,6 +858,11 @@ extern _X_EXPORT void	XkbGetRulesDflts(
         XkbRMLVOSet *           /* rmlvo */
 );
 
+extern _X_EXPORT void   XkbFreeRMLVOSet(
+        XkbRMLVOSet *           /* rmlvo */,
+        Bool                    /* freeRMLVO */
+);
+
 extern _X_EXPORT void	XkbSetRulesDflts(
         XkbRMLVOSet *           /* rmlvo */
 );