Rounding in Eq 326

[bheng]

The Round( ) function used in Eq 326 does not appear to be defined in Section 5.8 or anywhere else.

I don't think there are any tricky 0.5 cases in that invAngle table, but better to officially define what Round( ) is intended to mean here.

[fbossen]

Round() was defined in S2001-v9:

Round( x ) = Sign( x ) * Floor( Abs( x ) + 0.5 )

Someone must have recently been hitting the delete key a bit too happily...

[yk]

My fault. Some unused functions got removed recently. For this one, I searched "Round(", but unfortunately that did not capture it. Need to double check whether any function definition also got removed like this.

[yk]

Thanks! Will be fixed in S2001-vE.