suzerain: correct memset calling order

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42442 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2503 Add baseflow_uniform

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42443 0bd85f0b-c151-43b9-a1e9-27231104551f