Issue 171: window test border size fixed.
Issue 171: window test border size fixed.

mpasternak/pyglet-fix-issue-518-522,mpasternak/michaldtz-fix-552,xshotD/pyglet,qbektrix/pyglet,Austin503/pyglet,mpasternak/pyglet-fix-issue-552,arifgursel/pyglet,mpasternak/michaldtz-fixes-518-522,shaileshgoogler/pyglet,mpasternak/pyglet-fix-issue-552,odyaka341/pyglet,kmonsoor/pyglet,kmonsoor/pyglet,shaileshgoogler/pyglet,arifgursel/pyglet,cledio66/pyglet,qbektrix/pyglet,shaileshgoogler/pyglet,gdkar/pyglet,cledio66/pyglet,gdkar/pyglet,google-code-export/pyglet,Alwnikrotikz/pyglet,mpasternak/pyglet-fix-issue-518-522,arifgursel/pyglet,Austin503/pyglet,Alwnikrotikz/pyglet,odyaka341/pyglet,Austin503/pyglet,mpasternak/michaldtz-fixes-518-522,mpasternak/michaldtz-fixes-518-522,kmonsoor/pyglet,google-code-export/pyglet,cledio66/pyglet,shaileshgoogler/pyglet,odyaka341/pyglet,xshotD/pyglet,qbektrix/pyglet,mpasternak/pyglet-fix-issue-552,Austin503/pyglet,google-code-export/pyglet,mpasternak/pyglet-fix-issue-518-522,gdkar/pyglet,shaileshgoogler/pyglet,odyaka341/pyglet,gdkar/pyglet,qbektrix/pyglet,arifgursel/pyglet,mpasternak/pyglet-fix-issue-518-522,xshotD/pyglet,gdkar/pyglet,cledio66/pyglet,Alwnikrotikz/pyglet,mpasternak/michaldtz-fix-552,mpasternak/pyglet-fix-issue-552,xshotD/pyglet,mpasternak/michaldtz-fix-552,xshotD/pyglet,odyaka341/pyglet,arifgursel/pyglet,google-code-export/pyglet,Alwnikrotikz/pyglet,kmonsoor/pyglet,qbektrix/pyglet,Alwnikrotikz/pyglet,Austin503/pyglet,google-code-export/pyglet,mpasternak/michaldtz-fix-552,mpasternak/michaldtz-fixes-518-522,kmonsoor/pyglet,cledio66/pyglet