[monitoring-plugin-perl] update changelog

[Sven Nierlein]

 Module: monitoring-plugin-perl
 Branch: master
 Commit: 19ccd1dcb6a2ed0f13852118e988806792470782
 Author: Sven Nierlein <sven at nierlein.de>
   Date: Thu Dec  3 12:38:54 2015 +0100
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugin-perl/commit/?id=19ccd1d

update changelog

---

 Changes | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Changes b/Changes
index d65b304..12ca8f2 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Perl module Monitoring::Plugin.
 
+next:
+  - convert empty perfdata values to 'U' (daku3649)
+
 0.39 11th April 2015
   - fix help formating when using colons (Evgeni Golov)
   - fix "Redundant argument in sprintf" in perl 5.21 (RT #103214)