TwoPoint statistic gives different results when calculate_theory_vector is called after resetting the statistic

[marcpaterno]

TwoPoint.calculate_theory_vector yields a different result when called a second time that it did when called the first time when the statistic object is reset and the updated to be in the same state.

[marcpaterno]

This is closed by release 1.7.5

[vitenti]

@marcpaterno can we close this one?

[marcpaterno]

Yes