Floating-point leftovers: lib_rend/lib_rend_fx.c, makeCustomLsSetup()

Bug description

In the function makeCustomLsSetup() there is floating-point code left, namely:

• fabsf()
• EPSILON
• rendCustomLsLayout.elevation[]

IF( fabsf( rendCustomLsLayout.elevation[i] ) > EPSILON )
{
    customLs.is_planar_setup = 0;
    move16();
    BREAK;
}

Also, instead of rendCustomLsLayout.elevation[i] the comparison should be made against rendCustomLsLayout.elevation_fx[i]