urlmon: Don't post notif message if we're in task processing loop.

dlls/urlmon/bindprot.c

@@ -205,7 +205,7 @@ static void push_task(BindProtocol *This, task_header_t *task, task_proc_t proc)
         This->task_queue_tail = task;
     }else {
         This->task_queue_tail = This->task_queue_head = task;
-        do_post = TRUE;
+        do_post = !This->continue_call;
     }
 
     LeaveCriticalSection(&This->section);