I like the way gnus-summary-rescan-group keeps point on the current
article, but I notice it goes back to the start of the buffer if the
current article has been cancelled.  I strike this when going though
old mail moving or deleting stuff.

I'd like to propose the change below to look for an uncancelled
article to preserve the position.  Maybe the search loop could be
written better, this was the best I could come up with.

	* gnus-sum.el (gnus-summary-find-uncancelled): New function.
	(gnus-summary-reselect-current-group): Use it.