- Fix: CGUIImage no longer scales wrong when working with textures which don't have the original image size.
- Fix CSoftwareTexture2 calculation for OriginalSize of ITexture. It had returned the changed texture size instead of the original one.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5138 dfc29bdd-3216-0410-991c-e03cc46cb475