2001-10-23 Per Abrahamsen <abraham@dina.kvl.dk>

2001-10-23  Per Abrahamsen  <abraham@dina.kvl.dk>

	* gnus.el (gnus-news-group-p): Rewrote.  Now accepts a header
	vector (it didn't before because of a bug).
	* gnus-msg.el (gnus-post-news): Use header vector directly, if
	available.  Before it converted it to an article number.

	This makes followup to news articles with negative numbers in
	nnvirtual groups use news instead of mail.