We might end up not using the old context anymore after that and the GL
implementation is allowed to delay executing commands indefinitely if we
don't flush.
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>