int32/64 cast issue #4384

>>> np.__version__
'1.9.0.dev-3a2f048'
>>> a = np.array([1,2,3], dtype=np.int64)
>>> np.repeat(a, a)
Traceback (most recent call last):
  File "<ipython-input-23-739b853dec18>", line 1, in <module>
    np.repeat(a, a)
  File "/usr/local/lib/python2.7/dist-packages/numpy/core/fromnumeric.py", line 391, in repeat
    return repeat(repeats, axis)
TypeError: Cannot cast array data from dtype('int64') to dtype('int32') according to the rule 'safe'

>>> np.repeat(a, a.astype('int32'))
array([1, 2, 2, 3, 3, 3], dtype=int64)

python: 2.7.3.final.0
python-bits: 32
OS: Linux
OS-release: 3.2.0-58-generic-pae
machine: i686
processor: i686
byteorder: little
LC_ALL: None
LANG: en_CA.UTF-8
numpy: 1.9.0.dev-3a2f048