Converted the instances of const built in types being returned from methods

and passed as paramters into straight forward non const built in types,
i.e. const bool foogbar(const int) becomes bool foobar(int).

include/osg/ClearNode

@@ -35,10 +35,10 @@ class SG_EXPORT ClearNode : public Group
         META_Node(osg, ClearNode);
 
 	/** Sets the flag which control whether a glClear is required at the beginning of each frame. */
-        inline void setRequiresClear(const bool requiresClear) { _requiresClear = requiresClear; }
+        inline void setRequiresClear(bool requiresClear) { _requiresClear = requiresClear; }
 
 	/** Gets the flag which control whether a glClear is required at the beginning of each frame. */
-        inline const bool getRequiresClear() const { return _requiresClear; }
+        inline bool getRequiresClear() const { return _requiresClear; }
 
 	/** Sets the clear color. */
         inline void setClearColor(const Vec4& color) { _clearColor = color; }