don't process any input-device packet data when in readonly mode

git-svn-id: https://xpra.org/svn/Xpra/trunk@19381 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/x11/server.py

@@ -897,7 +897,7 @@ def _process_configure_window(self, proto, packet):
             size_changed = oww!=w or owh!=h
         if is_ui_driver or size_changed or not shown:
             damage = False
-            if is_ui_driver and len(packet)>=13:
+            if is_ui_driver and len(packet)>=13 and not self.readonly:
                 pwid = packet[10]
                 pointer = packet[11]
                 modifiers = packet[12]