FIX: Fixed __verify_valid_pool due to Bourne $? eval
FIX: Fixed __verify_valid_pool due to Bourne $? eval

Bourne evaluates the “0” returned for $? as true but adding a && to an
if statement will void this. Moved to single if test condition.

Revised __verify_valid_pool to account for the above handling.

chyves/chyves