BLD: sparc test_decimalDecodeTest - {u'a': 4.56} + {u'a': 4.5600000000000005}
```
======================================================================
FAIL: test_decimalDecodeTest (pandas.io.tests.test_json.test_ujson.UltraJSONTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/yoh/deb/gits/pkg-exppsy/pandas/debian/tmp/usr/lib/python2.7/dist-packages/pandas/io/tests/test_json/test_ujson.py", line 102, in test_decimalDecodeTest
    self.assertEqual(sut, decoded)
AssertionError: {u'a': 4.56} != {u'a': 4.5600000000000005}
- {u'a': 4.56}
+ {u'a': 4.5600000000000005}
```

on 0.12.0~rc1+git43-g7b2eaa4-1
