avoid where possible (by checking beforehand), and assert when caught
Conflicts:

	framework/source/fwe/classes/framelistanalyzer.cxx
	framework/source/helper/titlebarupdate.cxx
	framework/source/services/frame.cxx
	framework/source/uifactory/windowcontentfactorymanager.cxx
	sfx2/source/notify/eventsupplier.cxx