Clarify what the @event is used for when calling gtk_drag_begin()
Clarify what the @event is used for when calling gtk_drag_begin()

Signed-off-by: Federico Mena Quintero <4999915a961edfd7686112c2935288e1266eae14@novell.com>

Distrotech/gtk,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Unity-Technologies/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2