fixing compiler warning

src/ol/Map.js

@@ -387,7 +387,7 @@ ol.Map.prototype.moveByPx = function(dx, dy) {
 
 /**
  * @param {ol.geom.Point} loc the location being requested 
- * @returns {Object} the 
+ * @returns {Array} the position of the location in pixel space
  */
 ol.Map.prototype.getViewportPosition = function(loc) {
     //TODO: delegate this to the renderers

src/ol/Popup.js

@@ -3,8 +3,6 @@ goog.provide('ol.Popup');
 goog.require('ol.Map');
 goog.require('ol.Loc');
 goog.require('ol.Feature');
-//goog.require('goog.dom');
-//goog.require('goog.style');
 
 
 /**
@@ -235,7 +233,7 @@ ol.Popup.prototype.setAnchorOffset_ = function() {
     if (this.anchor_ instanceof ol.Feature) {
         this.pos_ = this.anchor_.getGeometry().getCentroid();
     } else {
-        this.pos_ = this.anchor_;
+        this.pos_ = new ol.geom.Point(this.anchor_.getX(), this.anchor_.getY());
     }
     
     var popupPosPx = this.map_.getViewportPosition(this.pos_);