memdc and bitmap fixes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@260 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/dcclient.h

@@ -99,6 +99,7 @@ class wxPaintDC: public wxDC
     GdkGC        *m_textGC;
     GdkGC        *m_bgGC;
     GdkColormap  *m_cmap;
+    bool          m_isDrawable;
     
     void SetUpDC(void);
     GdkWindow *GetWindow(void);