suzerain: use applyOnTheLeft

Possibly avoids temporary, either way reduces the number
of local variables running about.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43838 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2979 draft unpack/repack

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@43839 0bd85f0b-c151-43b9-a1e9-27231104551f