[mutter] xwayland: free lockfile in start function on error

[Ray Strode <halfline src gnome org>]

commit 33bfcf56cef8b78fc87c66805e08b73b1028a451
Author: Ray Strode <rstrode redhat com>
Date:   Thu Apr 23 10:29:30 2015 -0400

    xwayland: free lockfile in start function on error
    
    Right now we just leak the lockfile.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748380

 src/wayland/meta-xwayland.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/wayland/meta-xwayland.c b/src/wayland/meta-xwayland.c
index 1f98445..aec1519 100644
--- a/src/wayland/meta-xwayland.c
+++ b/src/wayland/meta-xwayland.c
@@ -505,7 +505,10 @@ meta_xwayland_start (MetaXWaylandManager *manager,
 
 out:
   if (!started)
-    unlink (manager->lockfile);
+    {
+      unlink (manager->lockfile);
+      g_clear_pointer (&manager->lockfile, g_free);
+    }
   return started;
 }