Delete empty bridges objects

src/bridge/bridge.cpp

@@ -249,6 +249,11 @@ std::string Bridge::get_own_nick(const Iid& iid)
   return "";
 }
 
+size_t Bridge::connected_clients() const
+{
+  return this->irc_clients.size();
+}
+
 void Bridge::kick_muc_user(Iid&& iid, const std::string& target, const std::string& reason, const std::string& author)
 {
   this->xmpp->kick_user(iid.chan + "%" + iid.server, target, reason, author, this->user_jid);

src/bridge/bridge.hpp

@@ -104,6 +104,10 @@ public:
    * Misc
    */
   std::string get_own_nick(const Iid& iid);
+  /**
+   * Get the number of server to which this bridge is connected.
+   */
+  size_t connected_clients() const;
 
 private:
   /**