[frogr] Don't use g_slist_length to check for empty lists

[Mario Sanchez Prada <msanchez src gnome org>]

commit 7975cd507d73332b48090849b0d8dbe552f2f3dc
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Thu Nov 8 16:17:02 2012 +0100

    Don't use g_slist_length to check for empty lists

 src/frogr-controller.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/frogr-controller.c b/src/frogr-controller.c
index 21aca43..e303ab8 100644
--- a/src/frogr-controller.c
+++ b/src/frogr-controller.c
@@ -847,13 +847,13 @@ _perform_after_upload_operations (FrogrController *controller, UploadOnePictureD
       _set_location_for_picture (controller, uop_data);
     }
 
-  if (g_slist_length (frogr_picture_get_photosets (uop_data->picture)) > 0)
+  if (frogr_picture_get_photosets (uop_data->picture))
     {
       uop_data->photosets = frogr_picture_get_photosets (uop_data->picture);
       _add_picture_to_photosets_or_create (controller, uop_data);
     }
 
-  if (g_slist_length (frogr_picture_get_groups (uop_data->picture)) > 0)
+  if (frogr_picture_get_groups (uop_data->picture))
     {
       uop_data->groups = frogr_picture_get_groups (uop_data->picture);
       _add_picture_to_groups (controller, uop_data);