suzerain: workaround 0.7.2 wrt 0.7.4

The prior implementation was cute but failed on handling
some invocations from the command line.  This seems to work.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@45349 0bd85f0b-c151-43b9-a1e9-27231104551f