History fields not calculated due to "history_dimlevel" are still output (as NaNs)

[adrifoster]

Seemingly, if you don't calculate a history field because of your dimlevel, we still write out the data, as NaNs. This is kind of confusing and I think we should turn off the hist_addfield for that variable if we don't actually calculate it.

@rgknox apologies if this was already discussed and I missed it!

[rgknox]

This should be the case (i.e. they should not be written), which variable(s) are not doing this? (hoping not all!)

[adrifoster]

Actually nevermind I think this might be an issue with a new variable we (@noahlb123 and I) were trying to make. sorry!

[rgknox]

phew.. (wipes sweat off brow)
If you notice its a real bug, lets open this again and we will get it fixed.