Free Hero Mesh

  c=classes[m->class];
  if(!c) return;
  n=playfield[y*64+x-65];
  while(n!=VOIDLINK) {
    if(d && objects[n]->class==m->class) return;
    if(c->collisionLayers&classes[objects[n]->class]->collisionLayers) {
      u=objects[n]->up;
      pfunlink(n);
      objtrash(n);
      free(objects[n]);
      n=u;
    } else {
      n=objects[n]->up;
    }
  }
  generation_number_inc=0;
  n=objalloc(m->class);
  if(n==VOIDLINK) return;
  objects[n]->x=x;
  objects[n]->y=y;
  objects[n]->image=m->img;
  objects[n]->dir=m->dir;
  objects[n]->misc1=m->misc1;

static int vt1_objects_update(sqlite3_vtab*vt,int argc,sqlite3_value**argv,sqlite3_int64*rowid) {
  sqlite3_int64 id;
  int x,y,z;
  if(!main_options['e']) return SQLITE_LOCKED;
  if(argc==1) {
    // DELETE
    id=sqlite3_value_int64(argv[0]);
    pfunlink(id);
    objtrash(id);
    free(objects[id]);
    objects[id]=0;
  } else if(sqlite3_value_type(argv[0])==SQLITE_NULL) {
    // INSERT
    if(sqlite3_value_type(argv[1])!=SQLITE_NULL || sqlite3_value_type(argv[2])!=SQLITE_NULL) return SQLITE_CONSTRAINT_VTAB;
    if(sqlite3_value_type(argv[3])==SQLITE_NULL) return SQLITE_CONSTRAINT_NOTNULL;
    if(sqlite3_value_type(argv[7])==SQLITE_NULL) return SQLITE_CONSTRAINT_NOTNULL;
    if(sqlite3_value_type(argv[11])!=SQLITE_NULL) return SQLITE_CONSTRAINT_VTAB;
    if(sqlite3_value_type(argv[12])!=SQLITE_NULL) return SQLITE_CONSTRAINT_VTAB;