(match-end 1)))
(substring xrefs (match-beginning 1) (match-end 1))))
(setq number
- (string-to-int (substring xrefs (match-beginning 2)
+ (string-to-number (substring xrefs (match-beginning 2)
(match-end 2))))
(if (setq entry (gnus-gethash group xref-hashtb))
(setcdr entry (cons number (cdr entry)))