Change Debug data to u32 as it is a binary variable.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3685 dfc29bdd-3216-0410-991c-e03cc46cb475

include/ISceneNode.h

@@ -539,7 +539,7 @@ namespace scene
 		/** A bitwise OR of the types from @ref irr::scene::E_DEBUG_SCENE_TYPE.
 		Please note that not all scene nodes support all debug data types.
 		\param state The debug data visibility state to be used. */
-		virtual void setDebugDataVisible(s32 state)
+		virtual void setDebugDataVisible(u32 state)
 		{
 			DebugDataVisible = state;
 		}
@@ -547,7 +547,7 @@ namespace scene
 		//! Returns if debug data like bounding boxes are drawn.
 		/** \return A bitwise OR of the debug data values from
 		@ref irr::scene::E_DEBUG_SCENE_TYPE that are currently visible. */
-		s32 isDebugDataVisible() const
+		u32 isDebugDataVisible() const
 		{
 			return DebugDataVisible;
 		}
@@ -831,7 +831,7 @@ namespace scene
 		u32 AutomaticCullingState;
 
 		//! Flag if debug data should be drawn, such as Bounding Boxes.
-		s32 DebugDataVisible;
+		u32 DebugDataVisible;
 
 		//! Is the node visible?
 		bool IsVisible;