`ValueError` when `s` paramter is passed to `irfftn`

[vtavana]

The following example works with NumPy but not with mkl_fft.

import numpy
x = numpy.random.random((30, 20, 10))
numpy.fft.fftn(x, s=(10, 20, 10), axes=(0, 1, 2)).shape
# (10, 20, 10)

import mkl_fft, numpy
x = numpy.random.random((30, 20, 10))
mkl_fft.irfftn(x, s=(10, 20, 10), axes=(0, 1, 2)).shape
# ...
# ValueError: could not broadcast input array from shape (10,20) into shape (30,20)