[gimp] app: gtk_icon_info_free() deprecated since GTK+3.8.

[Jehan Pagès <jehanp src gnome org>]

commit eb7d59d327def4df2821a47e996505dd8a84ca41
Author: Jehan <jehan girinstud io>
Date:   Sun May 20 05:27:19 2018 +0200

    app: gtk_icon_info_free() deprecated since GTK+3.8.

 app/widgets/gimpviewrendererimagefile.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpviewrendererimagefile.c b/app/widgets/gimpviewrendererimagefile.c
index c75d47c..1898291 100644
--- a/app/widgets/gimpviewrendererimagefile.c
+++ b/app/widgets/gimpviewrendererimagefile.c
@@ -174,7 +174,7 @@ gimp_view_renderer_imagefile_get_icon (GimpImagefile *imagefile,
             {
               pixbuf = gtk_icon_info_load_icon (info, NULL);
 
-              gtk_icon_info_free (info);
+              g_object_unref (info);
             }
         }
     }