Suggestion: 4-byte alignment for uvol meshes

[machenmusik]

A suggestion:

It looks like the Corto library requires 4-byte alignment for buffers being decoded, but since uvol files do not enforce any alignment, the current Unity code is forcing a new buffer allocation and copy for each frame mesh.

It seems that both the allocation and the copy could be avoided if the uvol files created enforced 4-byte alignment for each frame mesh...