* fhandler_socket.cc (fhandler_socket::sendto): Drop out of loop if

has_been_closed gets set.
	(fhandler_socket::sendmsg): Ditto.
	* net.cc (wsock_event::wait): Don't initialize evts.  Don't try to
	evaluate network events if WSAEnumNetworkEvents fails.
	(wsock_event::release): Save last WSA error and set it again unless
	resetting to blocking socket fails.
	* wsock_event.h (class wsock_event): Remove destructor.

winsup/cygwin/wsock_event.h

@@ -16,12 +16,6 @@ class wsock_event
   WSAEVENT		event;
 public:
   wsock_event () : event (NULL) {};
-  ~wsock_event ()
-    {
-      if (event)
-	WSACloseEvent (event);
-      event = NULL;
-    };
 
   /* The methods are implemented in net.cc */
   bool prepare (int sock, long event_mask);