Fixed maximum column specification for persistent homology
Fixed maximum column specification for persistent homology

This was causing an error when calculating persistent intersection
homology in cases where *no* vertices are admissible. I would have
expected the boundary matrix to be *empty* in this case, but since
the code was incorrect, it instead defaulted to calculating normal
persistent homology.

Submanifold/Aleph,Submanifold/Aleph,Submanifold/Aleph