use standard method to identify context click on patch change

diff --git a/gtk2_ardour/patch_change.cc b/gtk2_ardour/patch_change.cc
index c8d003f845dc91bc09a51c17cf115e8ea3fc7156..4006cbdf469b7030ed3bf11d026edf18a4a8dc4a 100644 (file)
--- a/gtk2_ardour/patch_change.cc
+++ b/gtk2_ardour/patch_change.cc
@@ -183,7 +183,7 @@ PatchChange::event_handler (GdkEvent* ev)
                        }
                }
 
-               if (ev->button.button == 3) {
+               if (Gtkmm2ext::Keyboard::is_context_menu_event (&ev->button)) {
                        if (!_popup_initialized) {
                                initialize_popup_menus();
                                _popup_initialized = true;