- Fixed D3D8 compilation issues.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4804 dfc29bdd-3216-0410-991c-e03cc46cb475
Fix recently introduced crash when there is no hovered element but a focused gui element. Thanks @  christianclavet for reporting.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4805 dfc29bdd-3216-0410-991c-e03cc46cb475