give Layer.Vector a vertexremoved event, to be fired e.g. by the ModifyFeature control. r=bartvde (closes #3017)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11043 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/ModifyFeature.js

@@ -608,6 +608,11 @@ OpenLayers.Control.ModifyFeature = OpenLayers.Class(OpenLayers.Control, {
                vertex.geometry.parent) {
                 // remove the vertex
                 vertex.geometry.parent.removeComponent(vertex.geometry);
+                this.layer.events.triggerEvent("vertexremoved", {
+                    vertex: vertex.geometry,
+                    feature: this.feature,
+                    pixel: evt.xy
+                });
                 this.layer.drawFeature(this.feature, this.standalone ?
                                        undefined :
                                        this.selectControl.renderIntent);