Add amSupernode to make code clearer in the check-if-self-is-supernode case.

node/Topology.hpp

@@ -162,6 +162,11 @@ public:
 		return (_supernodeAddresses.count(zta) > 0);
 	}
 
+	/**
+	 * @return True if this node's identity is in the supernode set
+	 */
+	inline bool amSupernode() const { return _amSupernode; }
+
 	/**
 	 * Clean and flush database now (runs in the background)
 	 */
@@ -305,6 +310,9 @@ private:
 	std::vector< SharedPtr<Peer> > _supernodePeers;
 	Mutex _supernodes_m;
 
+	// Set to true if my identity is in _supernodes
+	volatile bool _amSupernode;
+
 	KISSDB _dbm;
 	Mutex _dbm_m;
 };