Fix for mistake with const for non pointer/reference with corrections in documentation.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35797 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mgl/pen.h

@@ -40,7 +40,7 @@ public:
     bool operator != (const wxPen& pen) const;
 
     void SetColour(const wxColour &colour);
-    void SetColour(const unsigned char red, const unsigned char green, const unsigned char blue);
+    void SetColour(unsigned char red, unsigned char green, unsigned char blue);
     void SetCap(int capStyle);
     void SetJoin(int joinStyle);
     void SetStyle(int style);