Match CScriptActor::PreRender

Former-commit-id: b17f7014c9

include/Kyoto/Graphics/CColor.hpp

@@ -61,7 +61,7 @@ public:
     return CColor((mRgba & ~0xff) | CCast::ToUint8(a * static_cast< float >(mA)));
   }
 
-  bool operator==(const CColor& other) { return mRgba == other.mRgba; }
+  bool operator==(const CColor& other) const { return mRgba == other.mRgba; }
 
   // TODO check
   static GXColor ToGX(uint c) { return *reinterpret_cast< const GXColor* >(&c); }