fix startup of smbd, nmbd, winbindd

fix startup of smbd, nmbd, winbindd

jra: POPT_ARG_VAL arguments need int values.
     I assume there're more places like this
     in the cmdline tools.

     Please fix this properly, as my commit is just
     a hack to get make test working again.

in samba4 we have a workaround for this see
smbd/server.c

metze
(This used to be commit 9cb1937fe8601e526b5c924930500e0a3b52abd5)