Adding in support for hit detection with canvas (and rendering holes in polygons). r=fredj (closes #3207)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11849 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Vector.js

@@ -843,9 +843,17 @@ OpenLayers.Layer.Vector = OpenLayers.Class(OpenLayers.Layer, {
         if (!this.renderer) {
             OpenLayers.Console.error(OpenLayers.i18n("getFeatureError")); 
             return null;
-        }    
+        }
+        var feature = null;
         var featureId = this.renderer.getFeatureIdFromEvent(evt);
-        return this.getFeatureById(featureId);
+        if (featureId) {
+            if (typeof featureId === "string") {
+                feature = this.getFeatureById(featureId);
+            } else {
+                feature = featureId;
+            }
+        }
+        return feature;
     },
 
     /**