[Nagios-Plugin] Fix POD error

[Holger Weiss]

 Module: Nagios-Plugin
 Branch: master
 Commit: 9fd276eac6473c18462c96e4a98a67d4a797d73c
 Author: Holger Weiss <holger at zedat.fu-berlin.de>
   Date: Sun Apr 18 22:07:59 2010 +0200
    URL: http://nagiosplug.git.sf.net/git/gitweb.cgi?p=nagiosplug/Nagios-Plugin;a=commit;h=9fd276e

Fix POD error

A "=back" command was missing.  (Fixed by Ryan Niebur for Debian,
forwarded by Ansgar Burchardt - RT56683)

---

 lib/Nagios/Plugin/Functions.pm |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/lib/Nagios/Plugin/Functions.pm b/lib/Nagios/Plugin/Functions.pm
index 0bff96f..455439c 100644
--- a/lib/Nagios/Plugin/Functions.pm
+++ b/lib/Nagios/Plugin/Functions.pm
@@ -392,6 +392,8 @@ If join_all is supplied, however, it will be used as a string to
 join the resultant critical, warning, and ok messages together i.e.
 all messages are joined and returned.
 
+=back
+
 =item get_shortname
 
 Return the default shortname used for this plugin i.e. the first