scipy.sparse.[hv]stack don't respect anymore the dtype parameter

[nouiz]

Hi,

As reported on the mailing list[1], scipy.sparse.[hv]stack do not respect the dtype parameter anymore.

@pv told that it was probably the new fast path added in master recently for those function that cause this.

Here is code that replicate this:

import scipy.sparse
from scipy.sparse import csr_matrix
import numpy as np
x = np.arange(5*5).reshape(5,5)
y = csr_matrix(x)
res = scipy.sparse.vstack([y,y], dtype='float32')
assert res.dtype == "float32"

[1] http://mail.scipy.org/pipermail/scipy-user/2013-December/035197.html

[nouiz]

thanks for the quick fix!