Avoid zero-sized problem when doing euclidean intersection
Avoid zero-sized problem when doing euclidean intersection

Zero-sized problem might occur when intersecting track with
constant zero weight. For such tracks we'll just use result
of algebraic intersection.

TODO: We probably need to have a separate BA step to adjust
positions of tracks with constant zero weight.

SoylentGraham/libmv,rgkoo/libmv-blender,petertsoi/libmv,petertsoi/libmv,rgkoo/libmv-blender,SoylentGraham/libmv,petertsoi/libmv,rgkoo/libmv-blender,SoylentGraham/libmv,petertsoi/libmv,SoylentGraham/libmv,rgkoo/libmv-blender,rgkoo/libmv-blender