trans.c (gnat_to_gnu): Use DECL_SIZE_UNIT instead of TYPE_SIZE_UNIT for the size to be assigned by a...

	* gcc-interface/trans.c (gnat_to_gnu) <N_Assignment_Statement>: Use
	DECL_SIZE_UNIT instead of TYPE_SIZE_UNIT for the size to be assigned
	by a call to memset if the LHS is a DECL.

From-SVN: r268296