server: Fix return value for FSCTL_PIPE_WAIT if pipe does not exist.

dlls/kernel32/tests/pipe.c

@@ -60,6 +60,12 @@ static void test_CreateNamedPipe(int pipemode)
         trace("test_CreateNamedPipe starting in byte mode\n");
     else
         trace("test_CreateNamedPipe starting in message mode\n");
+
+    /* Wait for non existing pipe */
+    ret = WaitNamedPipeA(PIPENAME, 2000);
+    ok(ret == 0, "WaitNamedPipe returned %d for non existing pipe\n", ret);
+    ok(GetLastError() == ERROR_FILE_NOT_FOUND, "wrong error %u\n", GetLastError());
+
     /* Bad parameter checks */
     hnp = CreateNamedPipeA("not a named pipe", PIPE_ACCESS_DUPLEX, pipemode | PIPE_WAIT,
         /* nMaxInstances */ 1,

server/named_pipe.c

@@ -900,7 +900,7 @@ static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code, c
             name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
             if (!(pipe = (struct named_pipe *)find_object( device->pipes, &name, OBJ_CASE_INSENSITIVE )))
             {
-                set_error( STATUS_PIPE_NOT_AVAILABLE );
+                set_error( STATUS_OBJECT_NAME_NOT_FOUND );
                 return 0;
             }
             if (!(server = find_available_server( pipe )))