except.c (find_prev_try): Break out from ....

	* except.c (find_prev_try): Break out from ....
	(duplicate_eh_regions): ... here; properly update prev_try pointers
	when duplication part of tree.
	(dump_eh_tree): Improve dumping.
	(verify_eh_region): New.
	(verify_eh_tree): Use it.

From-SVN: r145805