Merge pull request #150 from RHavar/patch-1

Update hub.go

Author: garyburd

examples/chat/hub.go

@@ -43,7 +43,7 @@ func (h *Hub) run() {
 case conn.send <- message:
 default:
 close(conn.send)
-delete(hub.connections, conn)
+delete(h.connections, conn)
 }
 }
 }