Fix bug in MaterialViewer - light control colors got initialized wrong.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4959 dfc29bdd-3216-0410-991c-e03cc46cb475
Allow moving the camera around with the mouse in the MaterialViewer.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4961 dfc29bdd-3216-0410-991c-e03cc46cb475