Implemented NtSignalAndWaitForSingleObject.

diff --git a/server/named_pipe.c b/server/named_pipe.c
index dd1d3dd..b5077be 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -106,6 +106,7 @@
     NULL,                         /* remove_queue */
     NULL,                         /* signaled */
     NULL,                         /* satisfied */
+    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     named_pipe_destroy            /* destroy */
 };
@@ -128,6 +129,7 @@
     default_fd_remove_queue,      /* remove_queue */
     default_fd_signaled,          /* signaled */
     no_satisfied,                 /* satisfied */
+    no_signal,                    /* signal */
     pipe_server_get_fd,           /* get_fd */
     pipe_server_destroy           /* destroy */
 };
@@ -156,6 +158,7 @@
     default_fd_remove_queue,      /* remove_queue */
     default_fd_signaled,          /* signaled */
     no_satisfied,                 /* satisfied */
+    no_signal,                    /* signal */
     pipe_client_get_fd,           /* get_fd */
     pipe_client_destroy           /* destroy */
 };