DistanceLodCalculator serialization bug

[stephengold]

When serializing, DistanceLodCalculator specifies a default of 32 for lodMultiplier. When de-serializing, it specifies a default of 2.7

This means that if the multiplier was 32 before saving the object, it will load with a value of 2.7

PR sent for this

[stephengold]

Fixed in master branch at 1cc43d9.