Remove unnecessary cast.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4927 dfc29bdd-3216-0410-991c-e03cc46cb475
Reverted r4918 (fullscreen window manager on Linux) as it has several problems on KDE which make it behave a lot worse than before.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4932 dfc29bdd-3216-0410-991c-e03cc46cb475