Fix bug 1962: deleteuser.php regression when OpenID plugin not enabled

The User_openid data object was explicitly listed as a related field to delete from in User::delete(); this class doesn't exist anymore by default since OpenID was broken out to a plugin.
Added UserDeleteRelated event for plugins to add related tables to delete from at user delete time.

1 files changed, 6 insertions, 0 deletions

diff --git a/plugins/OpenID/OpenIDPlugin.php b/plugins/OpenID/OpenIDPlugin.php
index 2309eea9d..e4aed2ddb 100644
--- a/plugins/OpenID/OpenIDPlugin.php
+++ b/plugins/OpenID/OpenIDPlugin.php
@@ -298,4 +298,10 @@ class OpenIDPlugin extends Plugin
                                    new ColumnDef('modified', 'timestamp')));
         return true;
     }
+
+    function onUserDeleteRelated($user, &$tables)
+    {
+        $tables[] = 'User_openid';
+        return true;
+    }
 }