RNULLS
else if($2.i == 0) $$.i = mn0(RNULLS);
{ $$.i = mn0(RNULLS); }
case RNULLS: nullstr[tptr] = TRUE; break;
case RNULLS:
case RNULLS:
case RNULLS: case FINAL:
case RNULLS:
case 1: case RSTR: case RCCL: case RNCCL: case RNULLS: