Make sure that backgroundGraphic icon is deleted on feature destroy, even if no indexer is being used. r=crschmidt (Pullup #1718)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@7996 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/Elements.js

@@ -810,7 +810,9 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
 
                 if (this.indexer) {
                     this.indexer.remove(element);
+                }
                 
+                if (element._style.backgroundGraphic) {
                     var backgroundId = geometry.id + this.BACKGROUND_ID_SUFFIX;
                     var bElem = OpenLayers.Util.getElement(backgroundId);
                     if (bElem && bElem.parentNode) {