[retro-gtk] reftest: Return early on video test failure

[Adrien Plazas <aplazas src gnome org>]

commit 3944fef08ec49fa56402342487ea4b3b90afc163
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Apr 13 12:19:15 2018 +0200

    reftest: Return early on video test failure
    
    This avoids to free the screenshots two times.

 tests/retro-reftest.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/tests/retro-reftest.c b/tests/retro-reftest.c
index c705ed1..16396c7 100644
--- a/tests/retro-reftest.c
+++ b/tests/retro-reftest.c
@@ -261,6 +261,8 @@ retro_reftest_test_video (RetroReftest *reftest)
     g_object_unref (reference_screenshot);
 
     g_test_fail ();
+
+    return;
   }
 
   g_object_unref (screenshot);