Original code from Sam Lantinga in SDL. Ported to Irrlicht by Joerg (https://sourceforge.net/p/irrlicht/patches/295/). Some minor changes by myself (avoid memory leak, slightly different parameter handling).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5006 dfc29bdd-3216-0410-991c-e03cc46cb475