Currently, gitweb shows only header and footer, if no differences are
found. This patch adds a "No differences found" message for the html
output.
Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>