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

lib/OpenLayers/Tween.js

@@ -5,7 +5,6 @@
 
 /**
  * @requires OpenLayers/BaseTypes/Class.js
- * @requires OpenLayers/Console.js
  */
 
 /**
@@ -137,9 +136,9 @@ OpenLayers.Tween = OpenLayers.Class({
             var b = this.begin[i];
             var f = this.finish[i];
             if (b == null || f == null || isNaN(b) || isNaN(f)) {
-                OpenLayers.Console.error('invalid value for Tween');
+                throw new TypeError('invalid value for Tween');
             }
-            
+
             var c = f - b;
             value[i] = this.easing.apply(this, [this.time, b, c, this.duration]);
         }