elofgren: VAR FIX: Initialize 'has' to an array and use isset() for removeList in ComponentSet::setByIDList() to fix undefined variable errors when saving 'SubscribeForm?' page.

(merged from branches/gsoc)


git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@41819 467b73ca-7a2a-4603-9d3b-597d59a354a9

core/model/ComponentSet.php

@@ -159,6 +159,7 @@ class ComponentSet extends DataObjectSet {
 	 * @param array $idList List of IDs.
 	 */
 	function setByIDList($idList) {
+		$has = array();
 		// Index current data
 		if($this->items) {
 			foreach( $this->items as $item )