* cp-objcp-common.c (cp_expr_size): Return NULL in the case

	size is undefined.

	* builtins.c (fold_builtin_memory_op): Check that expr_size match.
	* explow.c (expr_size, int_expr_size): Assert that size is non_NULL.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@119515 138bc75d-0d04-0410-961f-82ee72b054a4