Read mixed correlator tables from scalar_blocks properly
Read mixed correlator tables from scalar_blocks properly

Demanding that a block for l = 0 not have a pole at delta = 0 is too
fast. In mixed conformal block tables, delta = 0 is a pole and there is
nothing we can do about it. It is only unmixed blocks where a factor of
delta in the denominator is guaranteed to be paired with a factor of
delta in the numerator.

Signed-off-by: Connor Behan <89f96a099c47edae2e9c5a371cbf43991ac7aa8c@gmail.com>

cbehan/pycftboot