Reverted unification of positive and negative zeros when loaded from an STL file.
Reverted unification of positive and negative zeros when loaded
from an STL file.

prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r