* cp-tree.def (SWITCH_STMT): Add an extra operand.
	* cp-objcp-common.c (cp_common_init_ts): Mark it as TS_TYPED.
	* cp-tree.h (SWITCH_STMT_SCOPE): Define.
	* semantics.c (begin_switch__stmt): Pass scope to build_stmt.
	(finish_switch_stmt): Use SWITCH_STMT_SCOPE instead of TREE_CHAIN.

From-SVN: r172440