Making it so the canvas renderer returns true after rendering a feature. This saves an extra draw for every moveTo. p=vog,me r=me (closes #3225)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11851 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/Canvas.js

@@ -129,15 +129,24 @@ OpenLayers.Renderer.Canvas = OpenLayers.Class(OpenLayers.Renderer, {
      * Parameters:
      * feature - {<OpenLayers.Feature.Vector>} 
      * style - {<Object>} 
+     *
+     * Returns:
+     * {Boolean} The feature has been drawn completely.  If the feature has no
+     *     geometry, undefined will be returned.  If the feature is not rendered
+     *     for other reasons, false will be returned.
      */
     drawFeature: function(feature, style) {
-        style = style || feature.style;
+        var rendered;
-        style = this.applyDefaultSymbolizer(style);  
+        if (feature.geometry) {
-        
+            style = style || feature.style;
-        this.features[feature.id] = [feature, style]; 
+            style = this.applyDefaultSymbolizer(style);  
-        this.redraw();
-    },
 
+            this.features[feature.id] = [feature, style]; 
+            this.redraw();
+            rendered = true;
+        }
+        return rendered;
+    },
 
     /** 
      * Method: drawGeometry