Check the glutDisplayFunc() callback for being a NULL pointer. This is
authorRichard Rauch <rkr@olib.org>
Sat, 11 Oct 2003 07:44:02 +0000 (07:44 +0000)
committerRichard Rauch <rkr@olib.org>
Sat, 11 Oct 2003 07:44:02 +0000 (07:44 +0000)
commitcbca8ac9cefa125bd877871b9236845d1262263e
treef711c8f89eb5ef46cfe0074f793522df787c5256
parentb002d4d62a9591e15a8fc58d4043f103ce5d51de
Check the glutDisplayFunc() callback for being a NULL pointer.  This is
illegal and is disallowed in GLUT 3.0+, so we disallow it too in
freeglut 2.0.1+

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@221 7f0cb862-5218-0410-a997-914c9d46530a
src/freeglut_callbacks.c