Adding new Stanza groups causes SumB=0 assertion in CalculateStanzaParameters

[jeroens]

For a yet unexplored reason, SumB is computed as -INF instead of >0 when a new stanza config is added with at least 2 groups

[administrator]

related to #132

[jeroens]

I will see what I can improve on the database end, Joe

[jeroens]

This seems to happen when creating the very first stanza configuration in a model. When opening the edit multi-stanza dialog for such a stanza config, values are as follows:

vbK = -1
biomass for first group = NaN
biomass for second group = -9999
Z = -9999
Consumption/biomass = -9999

Clearly something is wrong; maybe you have an idea. The data in the database seems in complicance with other stanza groups in other databases.

[joeb]

Solving this created issues in the Stanza Dialog interface. It now displays the -9999 values (NULL)