opengl detection test file: fix the following warning: opengl.c: In function 'main': opengl.c:14: warning: the address of 'glutInit', will always evaluate as 'true'
opengl detection test file: fix the following warning:
opengl.c: In function 'main':
opengl.c:14: warning: the address of 'glutInit', will always evaluate as 'true'


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@27049 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot