Added wxStaticBitmap::SetIcon()

wxDC now inits with a WHITE_BRUSH as wxMSW seems to
   do the same
  small doc updates


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3134 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/statbmp.h

@@ -74,6 +74,12 @@ public:
         return (const wxIcon &)m_bitmap;
     }
 
+    // for compatibility with wxMSW
+    void  SetIcon(const wxIcon& icon)
+    {
+        SetBitmap( icon );
+    }
+
 private:
     // creates the new pixmap widget
     void CreatePixmapWidget();