errfn.c (cp_pedwarn, [...]): Replace extern decls with casts.

	* errfn.c (cp_pedwarn, cp_pedwarn_at, cp_error_at, cp_warning_at):
	Replace extern decls with casts.

	* decl.c (expand_start_early_try_stmts): Don't mess with a sequence.
	Update last_parm_cleanup_insn.
	(store_after_parms): Remove.
	* cp-tree.h: Adjust.

Fixes eh{39,40}.C

From-SVN: r17083