Fix Text._get_color when document color is None (i.e., during init).
Fix Text._get_color when document color is None (i.e., during init).

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