rem: int stk500_cmd(PROGRAMMER * pgm, unsigned char cmd[4], unsigned char res[4])
add: static int stk500_cmd(PROGRAMMER * pgm, unsigned char cmd[4], unsigned char res[4])
context: int stk500_cmd(PROGRAMMER * pgm, unsigned char cmd[4], unsigned char res[4]){  unsigned char buf[32];  buf[0] = Cmnd_STK_UNIVERSAL;  buf[1] = cmd[0];  buf[2] = cmd[1];  buf[3] = cmd[2];  buf[4] = cmd[3];  buf[5] = Sync_CRC_EOP;  stk500_send(pgm, buf, 6);  stk500_recv(pgm, buf, 1);  if (buf[0] != Resp_STK_INSYNC) {    fprintf(stderr, "%s: stk500_cmd(): programmer is out of sync\n", progname);    exit(1);  }  res[0] = cmd[1];  res[1] = cmd[2];  res[2] = cmd[3];  stk500_recv(pgm, &res[3], 1);  stk500_recv(pgm, buf, 1);  if (buf[0] != Resp_STK_OK) {    fprintf(stderr, "%s: stk500_cmd(): protocol error\n", progname);    exit(1);  }  return 0;}