Notice: Undefined property: views_plugin_query_default::$fields in views_plugin_query_default->query() (line 1181 of xxx)

Received this notice when using Views with OpenLayers maps.The notice references the views_plugin_query_default.inc file. I also received a PHP Warning: Invalid argument supplied for foreach() on line 1099 of the same file.

Both issues were resolved when I declared the $fields property on line 95:

var $fields = array();