Fix parameter types for compareTo().

lib/src/intx.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of fixnum;
 
 /**
  * A fixed-precision integer.
  */
-abstract class IntX implements Comparable {
+abstract class IntX implements Comparable<dynamic> {
 
   /** Addition operator. */
   IntX operator +(other);
 
   /** Subtraction operator. */
   IntX operator -(other);
 
   /**
    * Negate operator.
    *
@@ skipping 52 matching lines @@
   IntX operator >>(int shiftAmount);
 
   /**
    * Unsigned right-shift operator.
    *
    * Returns the result of shifting the bits of this integer by [shiftAmount]
    * bits to the right. High-order bits are filled with zeros.
    */
   IntX shiftRightUnsigned(int shiftAmount);
 
-  int compareTo(Comparable other);
+  int compareTo(other);
 
   /**
    * Returns `true` if and only if [other] is an int or IntX equal in
    * value to this integer.
    */
   bool operator ==(other);
 
   /** Relational less than operator. */
   bool operator <(other);
 
@@ skipping 134 matching lines @@
    */
   String toHexString();
 
   /**
    * Returns a string representing the value of this integer in the given radix.
    *
    * [radix] must be an integer in the range 2 .. 16, inclusive.
    */
   String toRadixString(int radix);
 }