Fix memory leaks in tree-ssa-uninit.c

Fix memory leaks in tree-ssa-uninit.c

	* tree-ssa-uninit.c (convert_control_dep_chain_into_preds):
	Fix GNU coding style.
	(find_def_preds): Use auto_vec.
	(destroy_predicate_vecs): Change signature of the function.
	(prune_uninit_phi_opnds_in_unrealizable_paths): Use the
	new signature.
	(simplify_preds_4): Use destroy_predicate_vecs instread of
	just releasing preds vector.
	(normalize_preds): Likewise.
	(is_use_properly_guarded): Use new signature of
	destroy_predicate_vecs.
	(find_uninit_use): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230519 138bc75d-0d04-0410-961f-82ee72b054a4