Fix error in viz/projections
Fix error in viz/projections

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