[gimp] app: forgotten GList freeing.

[Jehan <jehanp src gnome org>]

commit 9a0876b9bd6e10f691c552130b9b0cfdb2d54b89
Author: Jehan <jehan girinstud io>
Date:   Sat Aug 21 19:06:14 2021 +0200

    app: forgotten GList freeing.
    
    Thanks to Massimo for the report.

 app/actions/edit-commands.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/app/actions/edit-commands.c b/app/actions/edit-commands.c
index 787f818b2d..eda8f57b1d 100644
--- a/app/actions/edit-commands.c
+++ b/app/actions/edit-commands.c
@@ -502,7 +502,10 @@ edit_clear_cmd_callback (GimpAction *action,
   for (iter = drawables; iter; iter = iter->next)
     /* Return if any has a locked alpha. */
     if (! check_drawable_alpha (iter->data, data))
-      return;
+      {
+        g_list_free (drawables);
+        return;
+      }
 
   gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_PAINT,
                                _("Clear"));