[gimp] Issue 4456: CRITICAL **...: g_object_unref: assertion

[Jehan <jehanp src gnome org>]

commit 5adde64753bd42fffba4d7cbe2ad4c55c113dc9f
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Sun Jan 5 08:42:03 2020 +0100

    Issue 4456: CRITICAL **...: g_object_unref: assertion
    
    ...'G_IS_OBJECT (object)' failed

 app/file-data/file-data-gbr.c | 1 -
 app/file-data/file-data-pat.c | 1 -
 2 files changed, 2 deletions(-)
---
diff --git a/app/file-data/file-data-gbr.c b/app/file-data/file-data-gbr.c
index 5550f3228f..8bed235efe 100644
--- a/app/file-data/file-data-gbr.c
+++ b/app/file-data/file-data-gbr.c
@@ -397,7 +397,6 @@ file_gbr_brush_to_image (Gimp      *gimp,
   gimp_config_writer_close (writer);
 
   gimp_config_writer_finish (writer, NULL, NULL);
-  g_object_unref (writer);
 
   parasite = gimp_parasite_new ("GimpProcedureConfig-file-gbr-save-last",
                                 GIMP_PARASITE_PERSISTENT,
diff --git a/app/file-data/file-data-pat.c b/app/file-data/file-data-pat.c
index 35f2449d21..94e1cc61a2 100644
--- a/app/file-data/file-data-pat.c
+++ b/app/file-data/file-data-pat.c
@@ -209,7 +209,6 @@ file_pat_pattern_to_image (Gimp        *gimp,
   gimp_config_writer_close (writer);
 
   gimp_config_writer_finish (writer, NULL, NULL);
-  g_object_unref (writer);
 
   parasite = gimp_parasite_new ("GimpProcedureConfig-file-pat-save-last",
                                 GIMP_PARASITE_PERSISTENT,