server: Add support for restarting an async I/O when the client side couldn't finish it right away.
diff --git a/server/process.c b/server/process.c
index f947d6d..f06f5f4 100644
--- a/server/process.c
+++ b/server/process.c
@@ -87,6 +87,7 @@
     no_flush,                    /* flush */
     no_get_file_info,            /* get_file_info */
     no_queue_async,              /* queue_async */
+    NULL,                        /* reselect_async */
     no_cancel_async              /* cancel async */
 };