Fix MacOSX consts.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1038 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/MacOSX/CIrrDeviceMacOSX.h

@@ -49,7 +49,7 @@ namespace irr
 		virtual void setWindowCaption(const wchar_t* text);
 
 		//! returns if window is active. if not, nothing need to be drawn
-		virtual bool isWindowActive();
+		virtual bool isWindowActive() const;
 
 		//! presents a surface in the client area
 		virtual void present(video::IImage* surface, s32 windowId = 0, core::rect<s32>* src=0 );
@@ -92,7 +92,7 @@ namespace irr
 			}
 
 			//! Returns if the cursor is currently visible.
-			virtual bool isVisible()
+			virtual bool isVisible() const
 			{
 				return IsVisible;
 			}

source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm

@@ -422,7 +422,7 @@ void CIrrDeviceMacOSX::setWindowCaption(const wchar_t* text)
 	}
 }
 
-bool CIrrDeviceMacOSX::isWindowActive()
+bool CIrrDeviceMacOSX::isWindowActive() const
 {
 	return (_active);
 }