stor-layout.c (layout_type): If TYPE_ALIAS_SET was already set on the incomplete type force it into alias set 0.

	* stor-layout.c (layout_type): If TYPE_ALIAS_SET was already set on the
	incomplete type force it into alias set 0.

	* gcc.c-torture/execute/20001024-1.c: New test.

From-SVN: r37052