Another go at freeing the current context without causing a MESA error; didn't make a difference (but seems more correct anyway).
Another go at freeing the current context without causing a MESA error; didn't
make a difference (but seems more correct anyway).

--HG--
extra : convert_revision : svn%3A14d46d22-621c-0410-bb3d-6f67920f7d95/trunk%401661

infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore