A branch in the if/else if/else was missing a return, that was
unintended.
event->type == GDK_2BUTTON_PRESS)
return gtk_window_button_press_event (widget, &event->button);
else if (event->type == GDK_BUTTON_RELEASE)
- gtk_window_button_release_event (widget, &event->button);
+ return gtk_window_button_release_event (widget, &event->button);
else if (event->type == GDK_MOTION_NOTIFY)
return gtk_window_motion_notify_event (widget, &event->motion);
else