From ec5e9f6c875fea97d4e312045a346709df60a060 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 10 Aug 2011 21:30:03 +1000
Subject: [PATCH] Add empty query for signals

---
 signal.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/signal.hpp b/signal.hpp
index fa18c551..2cda7084 100644
--- a/signal.hpp
+++ b/signal.hpp
@@ -66,6 +66,11 @@ namespace util {
             unsigned int size (void) const
                 { return m_children.size (); }
 
+
+            bool empty (void) const
+                { return m_children.empty (); }
+
+
             /// Execute all callbacks, ignoring the return parameters. Does not combine results.
             void operator () (Args... tail) {
                 for (auto i = m_children.begin (), end = m_children.end (); i != end; ++i)