Windows warning fix.

libp2p/NodeTable.h

@@ -163,7 +163,7 @@ public:
 	std::list<NodeEntry> snapshot() const;
 	
 	/// Returns true if node id is in node table.
-	bool haveNode(NodeId const& _id) { Guard l(x_nodes); return m_nodes.count(_id); }
+	bool haveNode(NodeId const& _id) { Guard l(x_nodes); return m_nodes.count(_id) > 0; }
 	
 	/// Returns the Node to the corresponding node id or the empty Node if that id is not found.
 	Node node(NodeId const& _id);