[gimp] app: free GList (leak reported by Massimo).

[Jehan <jehanp src gnome org>]

commit 140652a478ab8a9b335618d8f99d97ee62432ccc
Author: Jehan <jehan girinstud io>
Date:   Mon Aug 16 19:29:46 2021 +0200

    app: free GList (leak reported by Massimo).

 app/paint/gimpink.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/app/paint/gimpink.c b/app/paint/gimpink.c
index d55ea49b22..10e528c6ba 100644
--- a/app/paint/gimpink.c
+++ b/app/paint/gimpink.c
@@ -454,6 +454,7 @@ gimp_ink_motion (GimpPaintCore    *paint_core,
   g_object_unref (color);
 
   g_list_free_full (blob_unions, g_free);
+  g_list_free (blobs_to_render);
 }
 
 static GimpBlob *