don't get into nested run loops if quantize is reinvoked (e.g control surface) while...

diff --git a/gtk2_ardour/editor_ops.cc b/gtk2_ardour/editor_ops.cc
index 079af7de59de42612b43226afbf8bd134963d54d..004aff4f082837b20af3d33c6b252af554a27501 100644 (file)
--- a/gtk2_ardour/editor_ops.cc
+++ b/gtk2_ardour/editor_ops.cc
@@ -5374,6 +5374,11 @@ Editor::quantize_regions (const RegionSelection& rs)
                quantize_dialog = new QuantizeDialog (*this);
        }
 
+       if (quantize_dialog->is_mapped()) {
+               /* in progress already */
+               return;
+       }
+
        quantize_dialog->present ();
        const int r = quantize_dialog->run ();
        quantize_dialog->hide ();