else if (o->option = TELOPT_SGA && o->send == DO)
else if (o->option == TELOPT_SGA && o->send == DO)
static void option_side_effects(struct Opt *o, int enabled) {    if (o->option == TELOPT_ECHO && o->send == DO)        echoing = !enabled;    else if (o->option = TELOPT_SGA && o->send == DO)        editing = !enabled;    ldisc_send(NULL, 0);               /* cause ldisc to notice the change */}