BUG: dmri_transpose_bvecs: fixed bug
BUG: dmri_transpose_bvecs: fixed bug

Former-commit-id: cf9b671adacf8bdec0e00768c8e5143e5403c4fa
Former-commit-id: 70085f9ac3b4e12384012292bc37d15cef94df48
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox