Fix a bug in ush/forecast_det.sh #1185
Description
Expected behavior
The workflow can run forecast jobs for gdas
Current behavior
When I run gdasfcst and gdasefmn jobs, they will fail because filecount: unbound variable in ush/forecast_det.sh: line 44
Machines affected
WCOSS2
To Reproduce
Run gdas or early enkf using the latest develop branch
Detailed Description
lfs/h2/emc/ens/noscrub/xianwu.xue/GEFS_v13_da/gw_gefs_da/scripts/../ush/forecast_det.sh: line 44: filecount: unbound variable