Sets whether the Clutter X11 backend should request ARGB visuals by default or not.
By default, Clutter requests RGB visuals.
If no ARGB visuals are found, the X11 backend will fall back to requesting a RGB visual instead.
ARGB visuals are required for the use_alpha property to work.
This function can only be called once, and before init is called.
| use_argb |
true if ARGB visuals should be requested by default |