Shared libs now get installed correctly on Linux.

Fixed a compile bug on bitmap.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@672 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/bitmap.h

@@ -49,6 +49,8 @@ class wxMask: public wxObject
     GdkBitmap *GetBitmap() const;
 
   protected:
+  
+    friend wxBitmap;
 
     GdkBitmap *m_bitmap;