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

git-svn-id: https://xpra.org/svn/Xpra/trunk@19388 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/x11/desktop_server.py

@@ -507,7 +507,7 @@ def _process_unmap_window(self, proto, packet):
 
     def _process_configure_window(self, proto, packet):
         wid, x, y, w, h = packet[1:6]
-        if len(packet)>=13:
+        if len(packet)>=13 and not self.readonly:
             pwid = packet[10]
             pointer = packet[11]
             modifiers = packet[12]