[evolution-ews] Fix a crash on local cache update of a GAL from OAB

[Milan Crha <mcrha src gnome org>]

commit f5433a05bbe46506ae8b04e874dbd4dc26867951
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jul 3 13:39:18 2017 +0200

    Fix a crash on local cache update of a GAL from OAB
    
    An overlook causing crash due to dereferencing already freed memory.

 src/addressbook/e-book-backend-ews.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/addressbook/e-book-backend-ews.c b/src/addressbook/e-book-backend-ews.c
index 205c9e4..56a42ec 100644
--- a/src/addressbook/e-book-backend-ews.c
+++ b/src/addressbook/e-book-backend-ews.c
@@ -2877,7 +2877,7 @@ ebb_ews_get_changes_sync (EBookMetaBackend *meta_backend,
                                guint32 delta_size = 0;
 
                                for (link = full_l; link; link = g_slist_next (link)) {
-                                       EwsOALDetails *det = full_l->data;
+                                       EwsOALDetails *det = link->data;
 
                                        /* Throw away anything older than we already have */
                                        if (det->seq <= sequence) {