dice: only try sending something if we actually have something to say

modules/Dice.py

@@ -93,8 +93,8 @@ class Dice(Module):
                 reply += result
                 if roll is not rolls[-1]:
                     reply += "; "
-
-        return self.reply(connection, replypath, reply)
+        if reply is not "":
+            return self.reply(connection, replypath, reply)
 
 # vi:tabstop=4:expandtab:autoindent
 # kate: indent-mode python;indent-width 4;replace-tabs on;