don't translate error message and replace console log with exception

lib/OpenLayers/Layer/PointTrack.js

@@ -5,7 +5,6 @@
 
 /**
  * @requires OpenLayers/Layer/Vector.js
- * @requires OpenLayers/Console.js
  */
 
 /**
@@ -64,10 +63,8 @@ OpenLayers.Layer.PointTrack = OpenLayers.Class(OpenLayers.Layer.Vector, {
      */
     addNodes: function(pointFeatures, options) {
         if (pointFeatures.length < 2) {
-            OpenLayers.Console.error(
-                    "At least two point features have to be added to create" +
-                    "a line from");
-            return;
+            throw new Error("At least two point features have to be added to " +
+                            "create a line from");
         }
         
         var lines = new Array(pointFeatures.length-1);
@@ -81,9 +78,7 @@ OpenLayers.Layer.PointTrack = OpenLayers.Class(OpenLayers.Layer.Vector, {
               var lonlat = pointFeature.lonlat;
               endPoint = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
             } else if(endPoint.CLASS_NAME != "OpenLayers.Geometry.Point") {
-                OpenLayers.Console.error(
-                        "Only features with point geometries are supported.");
-                return;
+                throw new TypeError("Only features with point geometries are supported.");
             }
             
             if(i > 0) {