Patrick Labatut 83feed56a0 Fix saving / loading empty PLY meshes
Summary:
Similar to D20392526, PLY files without vertices or faces should be allowed:
- a PLY with only vertices can represent a point cloud
- a PLY without any vertex or face is just empty
- a PLY with faces referencing inexistent vertices has invalid data

Reviewed By: gkioxari

Differential Revision: D20400330

fbshipit-source-id: 35a5f072603fd221f382c7faad5f37c3e0b49bb1
2020-04-01 04:51:20 -07:00
..
2020-03-17 08:58:40 -07:00
2020-01-23 11:53:46 -08:00
2020-03-30 11:27:41 -07:00
2020-01-23 11:53:46 -08:00