we are calling bind() with the wrong number of arguments

bind-arg-mismatch.txt

$ make
gcc -g -DIMPL_SECURITY -DNEW_RENT -DLEVEL_LOSS -DNEWEXP -DGROUP_NAMES -DIMPL_SECURITY -DNEW_RENT -DLEVEL_LOSS -DNEWEXP -DGROUP_NAMES  -c -o comm.o comm.c
...
comm.c:747:31: error: too many arguments to function call, expected 3, have 4
        if (bind(s, &sa, sizeof(sa), 0) < 0)    {
            ~~~~                     ^
/usr/include/sys/socket.h:557:1: note: 'bind' declared here
int     bind(int, const struct sockaddr *, socklen_t) __DARWIN_ALIAS(bind);
^
...
25 warnings and 2 errors generated.
make: *** [comm.o] Error 1