#4401 mmap encoding is acceptable for tray icons

xpra/client/gui/client_tray.py

@@ -238,7 +238,7 @@ def do_paint_rgb(self, context, encoding: str, rgb_format: str, img_data,
         if width != render_width or height != render_height:
             fire_paint_callbacks(callbacks, False, "tray paint must not use scaling")
             return
-        if encoding != "rgb":
+        if encoding not in ("rgb", "mmap"):
             fire_paint_callbacks(callbacks, False, f"invalid encoding for tray: {encoding!r}")
             return
         self.data = (rgb_format, width, height, rowstride, img_data[:], options)