Several getter functions in IAttributes made const (thx @Erik Schultheis for the patch)

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5293 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

 --------------------------
 Changes in 1.9 (not yet released)
 
+- Several getter functions in IAttributes made const (thx @Erik Schultheis for the patch)
 - Fix: CTriangleSelector no longer ignores meshbuffer transformations from skinned meshes (thx @AlexAzazel for report and test-model).
 - Randomizer now returns range 0..randMax as documented and no longer 1..randMax as it did before. randMax got reduced by 1.
   Note: You will generally get different numbers than before! If you need the exact old calculations, please check the corresponding sources in Irrlicht 1.8 in os.cpp/.h