[at-spi2-core] Fix missing NULL argument to g_strconcat.

[Frédéric Crozat <fcrozat src gnome org>]

commit 56640b9fc89be31ec6d44278c6f2ef0b69a9d74a
Author: Frederic Crozat <fcrozat novell com>
Date:   Tue Mar 8 11:11:23 2011 +0100

    Fix missing NULL argument to g_strconcat.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=644185

 registryd/registry-main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/registryd/registry-main.c b/registryd/registry-main.c
index c9c5758..083de19 100644
--- a/registryd/registry-main.c
+++ b/registryd/registry-main.c
@@ -98,7 +98,7 @@ kill_accessibility_bus ()
   home = getenv ("HOME");
   if (!home)
     return;
-  name = g_strconcat (home, "/", ".atspi-dbus-bus.pid");
+  name = g_strconcat (home, "/", ".atspi-dbus-bus.pid", NULL);
   if (!name)
     return;