Compile fixes for GTK 1.2

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31295 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/combobox.cpp

@@ -219,8 +219,10 @@ bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
     // and case-sensitive
     gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 
+#ifdef __WXGTK20__
     if (style & wxNO_BORDER)
         g_object_set( GTK_ENTRY( combo->entry ), "has-frame", FALSE, NULL );
+#endif
         
     GtkWidget *list = GTK_COMBO(m_widget)->list;