io: wait for incoming client in socket test

Exercise the GSource code for server sockets by calling
qio_channel_wait() prior to accepting the incoming client.
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

tests/test-io-channel-socket.c

@@ -114,6 +114,7 @@ static void test_io_channel_setup_sync(SocketAddress *listen_addr,
         QIO_CHANNEL_SOCKET(*src), connect_addr, &error_abort);
     qio_channel_set_delay(*src, false);
 
+    qio_channel_wait(QIO_CHANNEL(lioc), G_IO_IN);
     *dst = QIO_CHANNEL(qio_channel_socket_accept(lioc, &error_abort));
     g_assert(*dst);
 
@@ -181,6 +182,7 @@ static void test_io_channel_setup_async(SocketAddress *listen_addr,
 
     g_assert(!data.err);
 
+    qio_channel_wait(QIO_CHANNEL(lioc), G_IO_IN);
     *dst = QIO_CHANNEL(qio_channel_socket_accept(lioc, &error_abort));
     g_assert(*dst);