skip headers in which the original date value is empty.
(gnus-article-date-value): New function.
(gnus-article-save-original-date): Abolish.
- (gnus-display-mime): Save original date after doing all treatments.
+ (gnus-display-mime): Save original date after doing all treatments
+ as well.
2005-04-22 Katsumi Yamaoka <yamaoka@jpl.org>