Apply fix from ddc88ff2 to voxelized navigation, too
Apply fix from ddc88ff2 to voxelized navigation, too

This commit fixes navigation in overlapping nodes when the point is
close to the boundary. See also:
https://root-forum.cern.ch/t/unexpected-navigation-behaviour-with-overlapping-nodes/26618

karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,karies/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,olifre/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,karies/root