Fix a --wall warning and make code::blocks project work in 64-bit linux

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2477 dfc29bdd-3216-0410-991c-e03cc46cb475

include/IQ3Shader.h

@@ -659,7 +659,7 @@ namespace quake3
 			//return name < other.name;
 		}
 
-		const u32 getGroupSize () const
+		u32 getGroupSize () const
 		{
 			if ( 0 == VarGroup )
 				return 0;