[retro-gtk/gnome-3-26] core: Fix a memory leaks in destructor

[Adrien Plazas <aplazas src gnome org>]

commit 1cecca2b5c9e905f5900378380fa14cc11cdb7e8
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed Sep 27 11:20:51 2017 +0200

    core: Fix a memory leaks in destructor

 retro-gtk/retro-core.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index d925c85..953f404 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -695,6 +695,8 @@ retro_core_destructor (RetroCore *self)
   if (internal->media_uris != NULL)
     g_strfreev (internal->media_uris);
 
+  g_object_unref (internal->module);
+
   g_free (self->environment_internal);
 }