[gnome-photos] Use margin-{start, end} instead of deprecated margin-{left, right}

[Debarshi Ray <debarshir src gnome org>]

commit b8c7ec2083b580f7dacfc354469d28e551d26150
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Aug 13 22:24:58 2014 +0200

    Use margin-{start,end} instead of deprecated margin-{left,right}
    
    Fixes: https://bugzilla.gnome.org/734762

 src/photos-delete-notification.c   |    4 ++--
 src/photos-indexing-notification.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/photos-delete-notification.c b/src/photos-delete-notification.c
index 56266af..e10d9a8 100644
--- a/src/photos-delete-notification.c
+++ b/src/photos-delete-notification.c
@@ -245,8 +245,8 @@ photos_delete_notification_new (GList *items)
   g_object_new (PHOTOS_TYPE_DELETE_NOTIFICATION,
                 "column-spacing", 12,
                 "items", items,
-                "margin-left", 12,
-                "margin-right", 12,
+                "margin-start", 12,
+                "margin-end", 12,
                 "orientation", GTK_ORIENTATION_HORIZONTAL,
                 NULL);
 }
diff --git a/src/photos-indexing-notification.c b/src/photos-indexing-notification.c
index 1ae0919..047bff3 100644
--- a/src/photos-indexing-notification.c
+++ b/src/photos-indexing-notification.c
@@ -327,8 +327,8 @@ photos_indexing_notification_new (void)
 {
   return g_object_new (PHOTOS_TYPE_INDEXING_NOTIFICATION,
                        "column-spacing", 12,
-                       "margin-left", 12,
-                       "margin-right", 12,
+                       "margin-start", 12,
+                       "margin-end", 12,
                        "orientation", GTK_ORIENTATION_HORIZONTAL,
                        NULL);
 }