Joomla 1.0.9 Invalid argument supplied for foreach() in frontend.php on line 85

/**
* Cache some modules information
* @return array
*/
function &initModules() {
	global $database, $my, $Itemid;

	if (!isset( $GLOBALS['_MOS_MODULES'] )) {
		$query = "SELECT id, title, module, position, content, showtitle, params"
		. "\n FROM #__modules AS m"
		. "\n INNER JOIN #__modules_menu AS mm ON mm.moduleid = m.id"
		. "\n WHERE m.published = 1"
		. "\n AND m.access <= '". $my->gid ."'"
		. "\n AND m.client_id != 1"
		. "\n AND ( mm.menuid = '".$Itemid."' OR mm.menuid = 0 )"
		. "\n ORDER BY ordering";

		$database->setQuery( $query );
		$modules = $database->loadObjectList();
		foreach ($modules as $module) {
			$GLOBALS['_MOS_MODULES'][$module->position][] = $module;
		}
	}
	return $GLOBALS['_MOS_MODULES'];
}