[easytag] Fix memory leak in artwork types dialog

[David King <davidk src gnome org>]

commit 7c2d6467b66c9863100b12ae5f5e919e66c6a5e2
Author: David King <amigadave amigadave com>
Date:   Thu Feb 12 17:30:36 2015 +0000

    Fix memory leak in artwork types dialog

 src/tag_area.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/tag_area.c b/src/tag_area.c
index 45d480b..fd77689 100644
--- a/src/tag_area.c
+++ b/src/tag_area.c
@@ -1769,6 +1769,7 @@ on_picture_properties_button_clicked (GObject *object,
         }
 
         gtk_widget_destroy (PictureTypesWindow);
+        et_picture_free (pic);
     }
 
     g_list_free_full (selection_list, (GDestroyNotify)gtk_tree_path_free);