BF: Enforce integer division in setting number of sh coefficients.
BF: Enforce integer division in setting number of sh coefficients.

This raises an error on future numpy, because this is otherwise a float
and is used to index.

matthieudumont/dipy,matthieudumont/dipy,StongeEtienne/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,nilgoyyou/dipy,villalonreina/dipy,StongeEtienne/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy