Fix unit tests failing on 32 bits CPU archs

[onovy]

Without this patch, unit tests is failing on i686:

======================================================================
ERROR: test_pttl_should_return_value_for_expiring_key (test_fakeredis.TestFakeRedis)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/.pybuild/pythonX.Y_2.7/build/test_fakeredis.py", line 2675, in test_pttl_should_return_value_for_expiring_key
    self.redis.expire('foo', long_long_c_max)
  File "fakeredis.py", line 272, in expire
    return self._expire(name, time)
  File "fakeredis.py", line 281, in _expire
    raise redis.ResponseError("value is not an integer or out of "
ResponseError: value is not an integer or out of range.

======================================================================
ERROR: test_ttl_should_return_value_for_expiring_key (test_fakeredis.TestFakeRedis)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/.pybuild/pythonX.Y_2.7/build/test_fakeredis.py", line 2658, in test_ttl_should_return_value_for_expiring_key
    self.redis.expire('foo', long_long_c_max)
  File "fakeredis.py", line 272, in expire
    return self._expire(name, time)
  File "fakeredis.py", line 281, in _expire
    raise redis.ResponseError("value is not an integer or out of "
ResponseError: value is not an integer or out of range.

======================================================================
ERROR: test_pttl_should_return_value_for_expiring_key (test_fakeredis.TestFakeRedisDecodeResponses)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/.pybuild/pythonX.Y_2.7/build/test_fakeredis.py", line 2675, in test_pttl_should_return_value_for_expiring_key
    self.redis.expire('foo', long_long_c_max)
  File "fakeredis.py", line 194, in decode_response
    val = _decode(func(*args, **kwargs))
  File "fakeredis.py", line 272, in expire
    return self._expire(name, time)
  File "fakeredis.py", line 281, in _expire
    raise redis.ResponseError("value is not an integer or out of "
ResponseError: value is not an integer or out of range.

======================================================================
ERROR: test_ttl_should_return_value_for_expiring_key (test_fakeredis.TestFakeRedisDecodeResponses)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/.pybuild/pythonX.Y_2.7/build/test_fakeredis.py", line 2658, in test_ttl_should_return_value_for_expiring_key
    self.redis.expire('foo', long_long_c_max)
  File "fakeredis.py", line 194, in decode_response
    val = _decode(func(*args, **kwargs))
  File "fakeredis.py", line 272, in expire
    return self._expire(name, time)
  File "fakeredis.py", line 281, in _expire
    raise redis.ResponseError("value is not an integer or out of "
ResponseError: value is not an integer or out of range.

----------------------------------------------------------------------
Ran 1165 tests in 78.766s

FAILED (SKIP=580, errors=4)

[jamesls]

Looks like this is failing on travis, any ideas? https://travis-ci.org/jamesls/fakeredis/builds/157205722

[coveralls]

Coverage remained the same at 98.153% when pulling 291b5dc on onovy:32b_fix into 913d987 on jamesls:master.

[onovy]

fixed on 32, broke on 64 :).

Pushed new version