Unary minus operator applied to unsigned int

[fmigneault]

Under MSVC, using additional SDL checks raises an unary minus error.

This error is raised as applying -(unsigned int) results into an (unsigned int) instead of an (int).
This is expected behaviour according to MSVC Docs

lbp.hpp problematic line

I would like to confirm why the -v & v operation is done there?

This could simply be resolved by casting to int: -(int)v & v if it doesn't alter the code intended behaviour.