Turn off multisampling during tests before creating the first OpenGL context. Workaround for Mac Intel Renderer bug.
Turn off multisampling during tests before creating the first OpenGL context. Workaround for Mac Intel Renderer bug.

svn path=/trunk/libavg/; revision=3968

hoodie/libavg,yyd01245/libavg,th3infinity/libavg,libavg/libavg,scotty007/libavg,yyd01245/libavg,th3infinity/libavg,hoodie/libavg,scotty007/libavg,scotty007/libavg,libavg/libavg,yyd01245/libavg,scotty007/libavg,yyd01245/libavg,libavg/libavg,hoodie/libavg,hoodie/libavg,th3infinity/libavg,libavg/libavg,th3infinity/libavg