Biomass scaling for bare-soil evaporation in forbs follows trees instead of grasses

[dschlaep]

Function SW_VPD_init:
Currently, the calculations for the biomass scaling factor for bare-soil evaporation are for

• Forbs: v->forb.total_agb_daily[doy] = v->forb.litter_daily[doy] + v->forb.biolive_daily[doy];
• Trees: v->tree.total_agb_daily[doy] = v->tree.litter_daily[doy] + v->tree.biolive_daily[doy];
• Grasses: v->grass.total_agb_daily[doy] = v->grass.litter_daily[doy] + v->grass.biomass_daily[doy];

However, the calculation for forbs should be following grasses and not trees; correctly, it should be: v->forb.total_agb_daily[doy] = v->forb.litter_daily[doy] + v->forb.biomass_daily[doy];

This looks like a copy-paste-error.