Re: mutt/1537: Strange regexp behaviour: missing/ empty headers aren't checked for "empty" pattern match

[Rado Smiljanic <rado@xxxxxxxxxxxxxxxxxxx>]

Synopsis: Strange regexp behaviour: missing/ empty headers aren't checked for 
"empty" pattern match

**** Comment added by rado on Thu, 25 Aug 2005 14:29:59 +0200 ****
 After sleeping over it and checking source again (beware, I just looked at 
pattern.c,
I'm no expert for the whole code, so I have no idea about ill side-effects),
how about changing this:

   return (pat->not ^ (h->env->subject && regexec (pat->rx, h->env->subject, 0, 
NULL, 0) == 0));

to maybe something like this:

   return (pat->not ^ (regexec (pat->rx, h->env->subject ? h->env->subject : "" 
, 0, NULL, 0) == 0));

For the other headers accordingly.