BF: make sure array indices are integer
BF: make sure array indices are integer

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