Dispatch change event even when geometry is set to null

src/ol/feature.js

@@ -218,8 +218,8 @@ ol.Feature.prototype.handleGeometryChanged_ = function() {
   if (goog.isDefAndNotNull(geometry)) {
     this.geometryChangeKey_ = goog.events.listen(geometry,
         goog.events.EventType.CHANGE, this.handleGeometryChange_, false, this);
-    this.changed();
   }
+  this.changed();
 };