Applied patch from Ron Steinke to add signal accumulators so that signals

Applied patch from Ron Steinke to add signal accumulators so that signals

Mon Apr  2 16:41:08 2001  Owen Taylor  <otaylor@redhat.com>

	* Applied patch from Ron Steinke to add signal accumulators
	so that signals with the convention 'TRUE return means
	handled' stop emission on a TRUE return.

	* gtk/gtkmain.[ch]: Add private accumulator
	_gtk_boolean_handled_accumulator, used throughout GTK+.

	* gtk/gtkspinbutton.c: Add accumulator for ::output.

	* gtk/gtktipsquery.c: Add accumulator for ::widget_selected

	* gtk/gtkwidget.c: Add accumulators for event signals,
	::drag_motion, ::drag_drop. Use _gtk_boolean_handled_accumator
	for ::mnemonic-activate.

	* gtk/gtkwindow.c: Add accumulator for ::frame_event

Mon Apr  2 16:24:21 2001  Owen Taylor  <otaylor@redhat.com>

	* gtk/gtkwidget.c: Add missing include.