labelsgmfix: Fix detection of low-resolution input
labelsgmfix: Fix detection of low-resolution input

Missing include statement in commit 6a2eb99.

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3