socket.io : fix for functions used in storing data associated with client. Closes #734

socket.io/socket.io.d.ts

@@ -24,7 +24,7 @@ interface Socket {
 	join(name: string, fn: Function): Socket;
 	unjoin(name: string, fn: Function): Socket;
 	set(key: string, value: any, fn: Function): Socket;
-	get(key: string, value: any, fn: Function): Socket;
+	get(key: string, fn: Function): Socket;
 	has(key: string, fn: Function): Socket;
 	del(key: string, fn: Function): Socket;
 	disconnect(): Socket;