have bond style table exit when bond length is outside table range

/* ----------------------------------------------------------------------

   calculate potential u and force f at distance x

   insure x is between bond min/max

   insure x is between bond min/max, exit with error if not

------------------------------------------------------------------------- */

void BondTable::uf_lookup(int type, double x, double &u, double &f)

{

  int itable;

  double fraction,a,b;

  char estr[128];

  Table *tb = &tables[tabindex[type]];

  x = MAX(x,tb->lo);

  x = MIN(x,tb->hi);

  if (x < tb->lo) {

    sprintf(estr,"Bond length < table inner cutoff: "

            "type %d length %g",type,x);

    error->one(FLERR,estr);

  }

  if (x > tb->hi) {

    sprintf(estr,"Bond length > table outer cutoff: "

            "type %d length %g",type,x);

    error->one(FLERR,estr);

  }

  if (tabstyle == LINEAR) {

    itable = static_cast<int> ((x - tb->lo) * tb->invdelta);