Add vlm_MessageSimpleNew with --disable-vlm

src/missing.c

@@ -360,11 +360,16 @@ void vlm_MessageDelete (vlm_message_t *m)
     assert (0);
 }
 
-vlm_message_t *vlm_MessageNew (const char *a, const char *fmt, ...)
+vlm_message_t *vlm_MessageSimpleNew (const char *a)
 {
     return NULL;
 }
 
+vlm_message_t *vlm_MessageNew (const char *a, const char *fmt, ...)
+{
+    return vlm_MessageSimpleNew (a);
+}
+
 vlm_t *__vlm_New (vlc_object_t *obj)
 {
      msg_Err (obj, "VLM not compiled-in!");