*: Allow returns to work with --enable-undefined-behavior

*: Allow returns to work with --enable-undefined-behavior

If you have undefined behavior compilation checking gcc
starts to complain about a bunch of places that do not
have return's.  When most of them actually do and we
have the assert's to prove it.  I'm just doing this
to make the compiler happy for me, so I can continue
to do work.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>