Fix #457642, reported by Christian Persch.

Fix #457642, reported by Christian Persch.

2007-08-21  Kristian Rietveld  <kris@imendio.com>

	Fix #457642, reported by Christian Persch.

	* gtk/gtktooltip.c: added debugging output which can be compiled
	in with a #define, annotated all coordinate translations in the
	source code,
	(find_widget_under_pointer): remove the "no-window correction";
	always convert the coordinates from window relative to allocation
	relative; after recursing through a container, translate the
	coordinates from container allocation relative to child widget
	allocation relative;
	(find_topmost_widget_from_event): now we get allocation relative
	coordinates here we do not have to distinguish no-window and window
	widgets.

svn path=/trunk/; revision=18663