Bugfix: IGUIElement::addChild now prevents setting an element as it's own child (fixes for example a crash in the GUI-editor).


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4694 dfc29bdd-3216-0410-991c-e03cc46cb475
Add new test file to project files

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4695 dfc29bdd-3216-0410-991c-e03cc46cb475