ShapeNet load_textures to False

[Flegyas]

🐛 Bugs / Unexpected behaviors

There's a little bug in the _load_mesh method in shapenet_base.py.

Instructions To Reproduce the Issue:

1. Set the field load_textures to False

The code tries to return the value of textures before it is assigned (since it happens only when the field is enabled) resulting in a UnboundLocalError: local variable 'textures' referenced before assignment.

It should be initialized in advance or not returned at all when the field is disabled.

[albertotono]

@Flegyas , I had a similar problem here #444

[Flegyas]

I'm so sorry for the duplicate! I searched before opening the issue and I saw yours, but I thought it wasn't related to mine.
I should've read the last part too!