TankOs/SFGUI — pull request #123 by GloryFish (2012-01-17 20:26:46+00:00)
Title: Latest version of sf::Window uses IsOpen()

A few days ago the SFML Window API was [changed](https://github.com/LaurentGomila/SFML/commit/c2039e866cd6108398dad2f49292a75ee271b43b) so now calls to sf::Window.IsOpened() are now sf::Window.IsOpen(). This is causing the cmake build to break.

Doing a simple find and replace fixes everything up.