PR c++/7754
	* decl2.c (finish_anon_union): Do not expand anonymous unions when
	procesing template functions.
	* pt.c (tsubst_decl, case VAR_DECL): Try to complete the variable
	type. Call layout_decl.
	(tsubst_expr, case DECL_STMT): Handle anonymous unions.

From-SVN: r57961