some messages coming out of the opengl error handlers can come out as…

… unicode, ensure we don't try to send that to the network layer: always convert to string

git-svn-id: https://xpra.org/svn/Xpra/trunk@15017 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/client/ui_client_base.py

@@ -3026,7 +3026,7 @@ def record_decode_time(success, message=""):
                 assert success<0
                 decode_time = 0
                 paintlog("record_decode_time(%s, %s) decoding or painting skipped on wid=%s, %s: %sx%s", success, message, wid, coding, width, height)
-            self.send_damage_sequence(wid, packet_sequence, width, height, decode_time, message)
+            self.send_damage_sequence(wid, packet_sequence, width, height, decode_time, str(message))
         self._draw_counter += 1
         if PAINT_FAULT_RATE>0 and (self._draw_counter % PAINT_FAULT_RATE)==0:
             drawlog.warn("injecting paint fault for %s draw packet %i, sequence number=%i", coding, self._draw_counter, packet_sequence)