Fix bug with percent formats with no integer part

test/number_format_test.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.
  */
 
 library number_format_test;
 
 import 'package:unittest/unittest.dart';
 import 'package:intl/number_symbols_data.dart';
@@ skipping 125 matching lines @@
   test('Exponential form', () {
     var number = new NumberFormat("#.###E0");
     for (var x in testExponential.keys) {
       var formatted = number.format(testExponential[x]);
       expect(formatted, x);
       var readBack = number.parse(formatted);
       expect(testExponential[x], readBack);
     }
   });
 
+  test('Percent with no decimals and no integer part', () {
+    var number = new NumberFormat("#%");
+      var formatted = number.format(0.12);
+      expect(formatted, "12%");
+      var readBack = number.parse(formatted);
+      expect(0.12, readBack);
+  });
+
   // We can't do these in the normal tests because those also format the
   // numbers and we're reading them in a format where they won't print
   // back the same way.
   test('Parsing modifiers,e.g. percent, in the base format', () {
     var number = new NumberFormat();
     var modified = { "12%" : 0.12, "12\u2030" : 0.012};
     modified.addAll(testExponential);
     for (var x in modified.keys) {
       var parsed = number.parse(x);
       expect(parsed, modified[x]);
@@ skipping 38 matching lines @@
   });
 
   test('Unparseable', () {
     var format = new NumberFormat.currencyPattern();
     expect(() => format.parse("abcdefg"), throwsFormatException);
     expect(() => format.parse(""), throwsFormatException);
     expect(() => format.parse("1.0zzz"), throwsFormatException);
     expect(() => format.parse("-∞+1"), throwsFormatException);
   });
 }