tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Use offset_int for offset and size computations instead of HOST_WIDE_INT.

	* tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Use offset_int for
	offset and size computations instead of HOST_WIDE_INT.

From-SVN: r227819