class.c (finish_struct_1): Convert integer_zero_node to ssizetype before passing it to set_rtti_entry.

	* class.c (finish_struct_1): Convert integer_zero_node to
 	ssizetype before passing it to set_rtti_entry.
	* typeck2.c (initializer_constant_valid_p): Allow conversion of 0
	of any size to a pointer.

From-SVN: r21438