[IMP] bus: mini typo in websocket protocol

Well it is not a typo but a mini code improvement. The suggested diff
clarifies the intent of `_handle_control_frame` with regards to
`_get_messages`. Because it was `return self._handle...` we had to read
the method to determine if it was returning something in order to know
whether the message would be propagated to the rest of the websocket
routing by `_get_message`. Now it is clear that the control frames are
handled right away and that they are not propagated to the business.

closes odoo/odoo#110834

Signed-off-by: Julien Castiaux <juc@odoo.com>

addons/bus/websocket.py

@@ -414,7 +414,8 @@ class Websocket:
         """
         frame = self._get_next_frame()
         if frame.opcode in CTRL_OP:
-            return self._handle_control_frame(frame)
+            self._handle_control_frame(frame)
+            return
         if self.state is not ConnectionState.OPEN:
             # After receiving a control frame indicating the connection
             # should be closed, a peer discards any further data