[jsonrpc-glib] tests: don't leak return value

[Christian Hergert <chergert src gnome org>]

commit 223d8428b321a1d806335291b689a02168c2a473
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 27 03:07:14 2017 -0800

    tests: don't leak return value
    
    Fixes warning from ASAN when running tests.

 tests/test-server.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/tests/test-server.c b/tests/test-server.c
index a4bfc3d..765253c 100644
--- a/tests/test-server.c
+++ b/tests/test-server.c
@@ -178,6 +178,7 @@ test_basic (gboolean use_gvariant)
   g_assert_no_error (error);
   g_assert_cmpint (r, ==, TRUE);
   g_assert (return_value != NULL);
+  g_clear_pointer (&return_value, g_variant_unref);
 
   g_assert_cmpint (count, ==, 1);
 
@@ -200,6 +201,7 @@ test_basic (gboolean use_gvariant)
   g_assert_no_error (error);
   g_assert_cmpint (r, ==, TRUE);
   g_assert (return_value != NULL);
+  g_clear_pointer (&return_value, g_variant_unref);
 
   g_assert_cmpint (count, ==, 2);