-fixed Vector.sum()

bbiwarg/Utility/Vector.cs

@@ -125,7 +125,7 @@ namespace bbiwarg.Utility
             T result = (dynamic)0;
             for (int i = 0; i < this.length(); i++)
             {
-                result += (dynamic)elements[0];
+                result += (dynamic)elements[i];
             }
             return result;
         }