From 13a633eea44743e7fb12cccdd646b54960a7494d Mon Sep 17 00:00:00 2001
From: Valentin Lorentz <progval@progval.net>
Date: Sat, 2 Feb 2013 19:47:14 +0100
Subject: [PATCH] Prevent traceback if supybot.replies.genericNoCapability is
 empty.

---
 src/callbacks.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/callbacks.py b/src/callbacks.py
index e18838c8a..58c7025d9 100644
--- a/src/callbacks.py
+++ b/src/callbacks.py
@@ -519,7 +519,8 @@ class RichReplyMethods(object):
                 v = self._getConfig(conf.supybot.replies.noCapability)
                 v %= capability
             s = self.__makeReply(v, s)
-            return self._error(s, **kwargs)
+            if s:
+                return self._error(s, **kwargs)
         else:
             log.warning('Denying %s for some unspecified capability '
                         '(or a default).', self.msg.prefix)