io/channel-watch: Drop the unnecessary cast

There is no need to do a type cast on ssource->socket as it is
already declared as a SOCKET.

Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

io/channel-watch.c

@@ -130,13 +130,13 @@ qio_channel_socket_source_check(GSource *source)
     FD_ZERO(&wfds);
     FD_ZERO(&xfds);
     if (ssource->condition & G_IO_IN) {
-        FD_SET((SOCKET)ssource->socket, &rfds);
+        FD_SET(ssource->socket, &rfds);
     }
     if (ssource->condition & G_IO_OUT) {
-        FD_SET((SOCKET)ssource->socket, &wfds);
+        FD_SET(ssource->socket, &wfds);
     }
     if (ssource->condition & G_IO_PRI) {
-        FD_SET((SOCKET)ssource->socket, &xfds);
+        FD_SET(ssource->socket, &xfds);
     }
     ssource->revents = 0;
     if (select(0, &rfds, &wfds, &xfds, &tv0) == 0) {