[glib] tests: Fix a double-unref in the GSettings unit tests

[Philip Withnall <pwithnall src gnome org>]

commit 43fbb8652dbf516b5bf5cf91df46a2c2f3a93755
Author: Philip Withnall <withnall endlessm com>
Date:   Mon Feb 27 10:07:14 2017 +0000

    tests: Fix a double-unref in the GSettings unit tests
    
    g_settings_schema_source_get_default() is (transfer none), not (transfer
    full).
    
    Spotted by Marvin Schmidt.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779265

 gio/tests/gsettings.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gio/tests/gsettings.c b/gio/tests/gsettings.c
index 18d28c2..dfd4ee4 100644
--- a/gio/tests/gsettings.c
+++ b/gio/tests/gsettings.c
@@ -2373,10 +2373,8 @@ test_schema_list_keys (void)
                             "farewell",
                             NULL));
 
-
   g_strfreev (keys);
   g_settings_schema_unref (schema);
-  g_settings_schema_source_unref (src);
 }
 
 static void