fixed warning about const qualifier

git-svn-id: svn://anubis/misc/wfobj@132 bd8a9e45-a331-0410-811e-c64571078777

WFObj.hh

@@ -22,7 +22,7 @@ protected:
 	{
 	public:
 		float operator[](int idx) const { return data[idx]; }
-		const float & operator[](int idx) { return data[idx]; }
+		float & operator[](int idx) { return data[idx]; }
 		float * getData() { return data; }
 	private:
 		float data[4];