tree-ssa-structalias.c (find_func_aliases_for_builtin_call): Fix handling of BUILT_IN_MEMPCPY_CHK and BUILT_IN_STPCPY_CHK.

	* tree-ssa-structalias.c (find_func_aliases_for_builtin_call): Fix
	handling of BUILT_IN_MEMPCPY_CHK and BUILT_IN_STPCPY_CHK.

From-SVN: r175682