[epiphany/wip/sync] password-manager: Fix crash when trying to cache NULL usernames

[Gabriel Ivașcu <gabrielivascu src gnome org>]

commit ab24b1fd83354ef6ab475c1287d276994263d174
Author: Gabriel Ivascu <ivascu gabriel59 gmail com>
Date:   Sun Jul 30 04:06:48 2017 +0300

    password-manager: Fix crash when trying to cache NULL usernames

 lib/sync/ephy-password-manager.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)
---
diff --git a/lib/sync/ephy-password-manager.c b/lib/sync/ephy-password-manager.c
index 48050b6..ea48dbb 100644
--- a/lib/sync/ephy-password-manager.c
+++ b/lib/sync/ephy-password-manager.c
@@ -290,7 +290,8 @@ populate_cache_cb (GSList   *records,
     const char *hostname = ephy_password_record_get_hostname (record);
     const char *username = ephy_password_record_get_username (record);
 
-    ephy_password_manager_cache_add (self, hostname, username);
+    if (username)
+      ephy_password_manager_cache_add (self, hostname, username);
   }
 
   g_slist_free_full (records, g_object_unref);
@@ -416,20 +417,24 @@ ephy_password_manger_store_record (EphyPasswordManager *self,
                                    EphyPasswordRecord  *record)
 {
   GHashTable *attributes;
+  const char *hostname;
+  const char *username;
 
   g_assert (EPHY_IS_PASSWORD_MANAGER (self));
   g_assert (EPHY_IS_PASSWORD_RECORD (record));
 
+  hostname = ephy_password_record_get_hostname (record);
+  username = ephy_password_record_get_username (record);
   attributes = get_attributes_table (ephy_password_record_get_id (record),
-                                     ephy_password_record_get_hostname (record),
-                                     ephy_password_record_get_username (record),
+                                     hostname,
+                                     username,
                                      ephy_password_record_get_username_field (record),
                                      ephy_password_record_get_password_field (record),
                                      ephy_synchronizable_get_server_time_modified (EPHY_SYNCHRONIZABLE 
(record)));
   store_internal (ephy_password_record_get_password (record), attributes, NULL, NULL);
-  ephy_password_manager_cache_add (self,
-                                   ephy_password_record_get_hostname (record),
-                                   ephy_password_record_get_username (record));
+
+  if (username)
+    ephy_password_manager_cache_add (self, hostname, username);
 
   g_hash_table_unref (attributes);
 }