Bastien Montagne
ac51e2f326
This was simply broken for vertex case (indexing loop normals with vert indices...). Turns out to be rather verbose to replace on-the-fly zero normals by default ones correctly, and do not want to make a full copy of the given custom normals array, so now this one is editied in place (replacing zero vectors by correct default normals). Don't think this could be a serious issue anyway.