fixed crash condition

src/main.rs

@@ -805,9 +805,15 @@ fn send_room_message(sender: Rc<RefCell<Client>>, message: &Vec<u8>, rooms: Rc<R
             continue;
         }
 
+
+        if *_k == sender_ref.id {
+            sender_ref.message_queue.extend(&write_buf);
+            sender_ref.notify.notify();
+        }else {
             let mut temp_mut = v.borrow_mut();
             temp_mut.message_queue.extend_from_slice(&write_buf);
             temp_mut.notify.notify();
+        }
         
     }