[gthumb] removed unnecessary unref

[Paolo Bacchilega <paobac src gnome org>]

commit ea4647aa7fddae96cea4fe4933f1beea7ab6ca79
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Wed Feb 7 19:14:29 2018 +0100

    removed unnecessary unref

 extensions/image_viewer/gth-image-viewer-page.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/extensions/image_viewer/gth-image-viewer-page.c b/extensions/image_viewer/gth-image-viewer-page.c
index 17b61b4..9f47e35 100644
--- a/extensions/image_viewer/gth-image-viewer-page.c
+++ b/extensions/image_viewer/gth-image-viewer-page.c
@@ -279,7 +279,6 @@ profile_ready_cb (GObject      *source_object,
        }
 
        profile_data_free (profile_data);
-       g_object_unref (res);
 }