removed GTK-specific SetModified() as we already have a public MarkDirty() which does the same thing

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39171 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/textctrl.cpp

@@ -454,7 +454,7 @@ gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
     if (g_isIdle)
         wxapp_install_idle_handler();
 
-    win->SetModified();
+    win->MarkDirty();
 
     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, win->GetId() );
     event.SetEventObject( win );