Builder::decorateAndCompileIfRequired returns wrong node

[lufriem]

I think that's more of a latent bug, but it looks to me like Builder::decorateAndCompileIfRequired should, in case it's directed to create a cull node but cannot compute the bounds, return the 'subgraph' variable rather than its 'node' argument

So, basically, change line 252 from 'return node;' to 'return subgraph;'

[robertosfield]

The fix looks appropriate, could you generate a PR for this fix, thanks.

I'm curious what is the type of GeomInfo.positions in your usage case?

[lufriem]

Sorry I thought I did, still trying to figure out git(hub). I came across this while reading through the code, I don't actually have any test code/data to force the code to run this particular execution branch.