[gnome-photos] base-item: Avoid redundant SPARQL queries and info-updated emissions

[Debarshi Ray <debarshir src gnome org>]

commit a42d392005e022b0c64027b8d008c9dd136182ed
Author: Alessandro Bono <shadow openaliasbox org>
Date:   Fri Oct 30 10:35:50 2015 +0100

    base-item: Avoid redundant SPARQL queries and info-updated emissions
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757015

 src/photos-base-item.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 104cf3c..2a5e7fd 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -406,6 +406,9 @@ photos_base_item_default_set_favorite (PhotosBaseItem *self, gboolean favorite)
 {
   PhotosBaseItemPrivate *priv = self->priv;
 
+  if (favorite == priv->favorite)
+    return;
+
   priv->favorite = favorite;
   photos_base_item_check_effects_and_update_info (self);
   photos_utils_set_favorite (priv->id, favorite);