Use constant with missing log2 function with cl (Visual Studio). https://tracker.physiomeproject.org/show_bug.cgi?id=2386: Automatic mipmap generation is buggy in some OpenGL implementations
Use constant with missing log2 function with cl (Visual Studio).
https://tracker.physiomeproject.org/show_bug.cgi?id=2386: Automatic mipmap generation is buggy in some OpenGL implementations

git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@6813 3c1deb5b-d424-0410-962d-aba41a686d42

hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc