[gnome-builder/gnome-builder-3-20] makecache: fix leak of duplicated makecache target

[Christian Hergert <chergert src gnome org>]

commit a5be15526718ea676e4eb8e9e72a0da8f8e1f3b4
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 18 14:55:33 2016 +0300

    makecache: fix leak of duplicated makecache target

 plugins/autotools/ide-makecache-target.h |    2 ++
 plugins/autotools/ide-makecache.c        |    4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/plugins/autotools/ide-makecache-target.h b/plugins/autotools/ide-makecache-target.h
index 5833d93..080e731 100644
--- a/plugins/autotools/ide-makecache-target.h
+++ b/plugins/autotools/ide-makecache-target.h
@@ -40,6 +40,8 @@ guint               ide_makecache_target_hash       (gconstpointer       data);
 gboolean            ide_makecache_target_equal      (gconstpointer       data1,
                                                      gconstpointer       data2);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (IdeMakecacheTarget, ide_makecache_target_unref)
+
 G_END_DECLS
 
 #endif /* IDE_MAKECACHE_TARGET_H */
diff --git a/plugins/autotools/ide-makecache.c b/plugins/autotools/ide-makecache.c
index 67b5615..03b83f7 100644
--- a/plugins/autotools/ide-makecache.c
+++ b/plugins/autotools/ide-makecache.c
@@ -324,14 +324,14 @@ ide_makecache_get_file_targets_searched (GMappedFile *mapped,
 
               if (is_target_interesting (targetstr))
                 {
-                  IdeMakecacheTarget *target;
+                  g_autoptr(IdeMakecacheTarget) target = NULL;
 
                   target = ide_makecache_target_new (subdir, targetstr);
 
                   if (!g_hash_table_contains (found, target))
                     {
                       g_hash_table_insert (found, target, NULL);
-                      g_ptr_array_add (targets, target);
+                      g_ptr_array_add (targets, g_steal_pointer (&target));
                     }
                 }