[imp] s/mime warnings

[Chuck Hagenbuch]

Quoting Jan Schneider <jan at horde.org>:

> I get these messages if I view an s/mime signed message with a
> certificate that isn't issued by a ca from my ca list:
> 
> Notice: Undefined variable: hex in
> /home/jan/headhorde/lib/Crypt/smime.php
> on line 1170
> 
> Notice: Undefined variable: plain in
> /home/jan/headhorde/lib/Crypt/smime.php
> on line 1170

I've taken a blind stab at these two. If you send me a test message, I'll
take slightly less blind stabs at all of them. :)

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
"People ask me all the time what it will be like living without otters."
 - Google, thanks to Harpers