[recipes] Fix a thinko

[Matthias Clasen <matthiasc src gnome org>]

commit 8ef998b4e2dc7c7b6aa3bfe8b7c4a3a5aeb903bf
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Feb 19 13:06:08 2017 -0500

    Fix a thinko
    
    gr_image_viewer_get_index was returning the number of images instead.

 src/gr-image-viewer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gr-image-viewer.c b/src/gr-image-viewer.c
index bdeb358..f2bc532 100644
--- a/src/gr-image-viewer.c
+++ b/src/gr-image-viewer.c
@@ -688,7 +688,7 @@ gr_image_viewer_show_image (GrImageViewer *viewer,
 int
 gr_image_viewer_get_index (GrImageViewer *viewer)
 {
-        return viewer->images->len;
+        return viewer->index;
 }
 
 void