wxPenRefData copy ctor was somehow not declared in the class definition

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@738 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/pen.cpp

@@ -24,6 +24,7 @@ class wxPenRefData: public wxObjectRefData
   public:
   
     wxPenRefData(void);
+    wxPenRefData(const wxPenRefData& data);
   
     int        m_width;
     int        m_style;

src/gtk1/pen.cpp

@@ -24,6 +24,7 @@ class wxPenRefData: public wxObjectRefData
   public:
   
     wxPenRefData(void);
+    wxPenRefData(const wxPenRefData& data);
   
     int        m_width;
     int        m_style;