[glib] gio: Fix a memory leak in gportalsupport.c

[Philip Withnall <pwithnall src gnome org>]

commit e694d1b673f8a65bb7e2cc4f8e03997a2ed2e04c
Author: Philip Withnall <philip tecnocode co uk>
Date:   Tue Jul 12 23:08:27 2016 +0100

    gio: Fix a memory leak in gportalsupport.c
    
    Coverity CID: 1357527

 gio/gportalsupport.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gio/gportalsupport.c b/gio/gportalsupport.c
index 4532cf0..74cb270 100644
--- a/gio/gportalsupport.c
+++ b/gio/gportalsupport.c
@@ -54,6 +54,8 @@ read_flatpak_info (void)
               g_strfreev (shared);
             }
         }
+
+      g_key_file_unref (keyfile);
     }
   else
     {