added wxWS_EX_TRANSIENT, added code for handling it and fixed wxLogGeneric

to avoid crashes related to creating the log dialog as child of a window which
is destroyed before it is


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12781 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/dialog.cpp

@@ -198,7 +198,10 @@ int wxDialog::ShowModal()
     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
     {
         wxWindow *parent = wxTheApp->GetTopWindow();
-        if ( parent && parent != this && parent->IsBeingDeleted() )
+        if ( parent &&
+                parent != this &&
+                    parent->IsBeingDeleted() &&
+                        !(parent->GetExtraStyle() & wxWS_EX_TRANSIENT) )
         {
             m_parent = parent;
             gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(parent->m_widget) );