Error in averaging of FATES_TVEG

[rosiealice]

In NOCOMP mode, where the canopy is not full (especially in the tropics) FATES_TVEG is reporting erroneously low values. This does not happen in SP mode. e.g.

Taken from here:
https://ns9560k.web.sigma2.no/datalake/diagnostics/noresm/rosief/n1850.FATES-SP.ne30_tn14.alpha08d.20241209/compare/n1850.FATES-NOCOMP.ne30_tn14.alpha08d.20241212/ANN/

As we discussed on 16/12/24 in the FATES SE meeting, the error is probably to do with this exception

fates/main/FatesHistoryInterfaceMod.F90

Line 5062 in 296e1d6

hio_tveg(io_si) = hlm_hio_ignore_val

which is supposed to cause the averaging in the HLM to ignore the values where there is no vegetation, but it does not seem to be working, hence this issue...