[evolution-ews/gnome-3-2] Avoid crash on contact parsing (part of bug #648877)

[Milan Crha <mcrha src gnome org>]

commit f719409b369c97690e30c249f93e7c685f46489e
Author: Milan Crha <mcrha redhat com>
Date:   Thu Dec 8 09:32:52 2011 +0100

    Avoid crash on contact parsing (part of bug #648877)

 src/addressbook/e-book-backend-ews.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/src/addressbook/e-book-backend-ews.c b/src/addressbook/e-book-backend-ews.c
index 1c63155..405492b 100644
--- a/src/addressbook/e-book-backend-ews.c
+++ b/src/addressbook/e-book-backend-ews.c
@@ -183,8 +183,10 @@ ebews_populate_uid	(EContact *contact, EEwsItem *item)
 	const EwsId *id;
 
 	id = e_ews_item_get_id (item);
-	e_contact_set (contact, E_CONTACT_UID, id->id);
-	e_contact_set (contact, E_CONTACT_REV, id->change_key);
+	if (id) {
+		e_contact_set (contact, E_CONTACT_UID, id->id);
+		e_contact_set (contact, E_CONTACT_REV, id->change_key);
+	}
 }
 
 static void
@@ -193,7 +195,8 @@ ebews_populate_full_name	(EContact *contact, EEwsItem *item)
 	const EwsCompleteName *cn;
 
 	cn = e_ews_item_get_complete_name (item);
-	e_contact_set (contact, E_CONTACT_FULL_NAME, cn->full_name);
+	if (cn)
+		e_contact_set (contact, E_CONTACT_FULL_NAME, cn->full_name);
 }
 
 static void
@@ -202,7 +205,8 @@ ebews_populate_nick_name	(EContact *contact, EEwsItem *item)
 	const EwsCompleteName *cn;
 
 	cn = e_ews_item_get_complete_name (item);
-	e_contact_set (contact, E_CONTACT_NICKNAME, cn->nick_name);
+	if (cn)
+		e_contact_set (contact, E_CONTACT_NICKNAME, cn->nick_name);
 }
 
 static void