[invader-build] implement this effect warning.

[Aerocatia]

We probably want this info in invader-build too.

WARNING: effect <path> with an alpha tint of zero, but that particle has nonlinear tinting and will never draw.

[Aerocatia]

The error condition is if the effect tag particles block has an entry with the tint upper bound and/or tint lower bound alpha set to 0 while referencing a particle tag with the nonlinear tint flag checked.

This is another cross-tag check