nanops._has_infs, which is used in determining whether to employ bottleneck optimizations, fails on dtypes which should otherwise be supported, including 'f2', complex, and multidimensional 'f4' and 'f8'.
>>> from pandas.core import nanops
>>> import numpy as np
>>>
>>> val0 = np.ones(10)*np.inf
>>> val1 = val0.astype('f2')
>>> val2 = val0+val0*1j
>>> val3 = np.tile(val0, (1, 10))
>>>
>>> nanops._has_infs(val0)
True
>>> nanops._has_infs(val1)
False
>>> nanops._has_infs(val2)
False
>>> nanops._has_infs(val3)
ValueError: Buffer has wrong number of dimensions (expected 1, got 2)
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