TLongFloatMapDecorator shows 0 as null

[Alejandro Corbellini]

There is a problem with at least 2 decorators (LongFloat and IntFloat if I remember right) regarding the handling of the zero value. Zero is shown in the map as "null". E.g. { 1=0.5, null=0.2}. Thanks!

[Jim Davies]

This is an error with the handling of the no entry value for the keys. You have added a value into the map for the no entry value. This is invalid, but I am uncertain on exactly how it should behave in this instance.

I will meditate on this, and I'll solve this as part of the fix for issue #4.