glcontext: Reinstate missing "!"
authorBenjamin Otte <otte@redhat.com>
Sat, 16 Oct 2021 13:47:05 +0000 (15:47 +0200)
committerBenjamin Otte <otte@redhat.com>
Sat, 16 Oct 2021 13:49:02 +0000 (15:49 +0200)
commitaa0c22b64813a406da9854fd079579d87181a97b
treec0ac9b4d4ad87dd4657a6619a171e03618a7bcea
parenta7ef4c75ea9c4f6605a3ae4c033150687d9eb08a
glcontext: Reinstate missing "!"

Replacing the return_if_fail()s in commit f584d4f50025 lost the
inversions.

Fixes #4349
gdk/gdkglcontext.c