Cancel drags when the grabs get broken. Fixes bug #333056:

Cancel drags when the grabs get broken. Fixes bug #333056:

2006-03-07  Federico Mena Quintero  <federico@novell.com>

	Cancel drags when the grabs get broken.  Fixes bug #333056:

	* gtk/gtkdnd.c (gtk_drag_selection_received): The time argument is
	a guint, not guint32.
	(gtk_drag_source_event_cb): Return gboolean, not gint.
	(gtk_drag_anim_timeout): Likewise.
	(gtk_drag_motion_cb): Likewise.
	(gtk_drag_key_cb): Likewise.
	(gtk_drag_button_release_cb): Likewise.
	(gtk_drag_abort_timeout): Likewise.
	(gtk_drag_begin_internal): Connect to "grab-broken-event" on the
	ipc_widget.
	(gtk_drag_source_info_destroy): Disconnect from the
	"grab-broken-event" callback.
	(gtk_drag_end): Likewise.
	(gtk_drag_grab_broken_event_cb): New callback.  We cancel the drag
	if the grab was broken and not regrabbed by the DnD code.

2006-03-07  Federico Mena Quintero  <federico@novell.com>

	* gtk/gtkfilechooserdefault.c (shortcuts_button_press_event_cb):
	Hack to let the treeview's button-press-event handler run before
	ours.  This lets the selection be updated before we pop up a
	context menu.