re PR middle-end/81005 (-fsanitize=null and -fsanitize=alignment doesn't check aggregate arguments of calls)

	PR middle-end/81005
	* ubsan.c (instrument_null): Avoid pointless code temporary.
	(pass_ubsan::execute): Instrument aggregate arguments of calls.

	* c-c++-common/ubsan/align-10.c: New test.
	* c-c++-common/ubsan/null-13.c: New test.

From-SVN: r249030