except.c (duplicate_eh_regions_0): Handle AKA bitmap.

	* except.c (duplicate_eh_regions_0): Handle AKA bitmap.
	(duplicate_eh_regions_1): Likewise.
	(duplicate_eh_regions): Likewise; cleanup code gorwing the region
	vector; call EH verification.
	(foreach_reachable_handler, can_throw_internal_1, can_throw_external_1):
	Be ready for region being removed.

From-SVN: r145230