[wing] namedpipe: fix assertion when the security descriptor is not set

[Ignacio Casal Quinteiro <icq src gnome org>]

commit d8d00b5cf956840b662d1dc5bf1cf8e81f282eac
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Tue May 23 15:40:50 2017 +0200

    namedpipe: fix assertion when the security descriptor is not set

 wing/wingnamedpipelistener.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/wing/wingnamedpipelistener.c b/wing/wingnamedpipelistener.c
index e2370c0..a01ba94 100644
--- a/wing/wingnamedpipelistener.c
+++ b/wing/wingnamedpipelistener.c
@@ -59,7 +59,7 @@ pipe_data_new (const gchar *pipe_name,
   data->pipe_name = g_strdup (pipe_name);
   data->pipe_namew = g_utf8_to_utf16 (pipe_name, -1, NULL, NULL, NULL);
   data->security_descriptor = g_strdup (security_descriptor);
-  data->security_descriptorw = g_utf8_to_utf16 (security_descriptor, -1, NULL, NULL, NULL);
+  data->security_descriptorw = security_descriptor != NULL ? g_utf8_to_utf16 (security_descriptor, -1, NULL, 
NULL, NULL) : NULL;
   data->handle = INVALID_HANDLE_VALUE;
   data->overlapped.hEvent = CreateEvent (NULL, /* default security attribute */
                                          TRUE, /* manual-reset event */