Added missing OpenGL.h to Window.h in CSFML git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/trunk@1107 4e206d99-4929-0410-ac5d-dfc041789085
Added missing OpenGL.h to Window.h in CSFML git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/trunk@1107 4e206d99-4929-0410-ac5d-dfc041789085