Free Hero Mesh

const char*load_level(int lvl) {
  // Load level by ID. Returns null pointer if successful, or an error message if it failed.
  long sz=0;
  unsigned char*buf=lvl>=0?read_lump(FIL_LEVEL,lvl,&sz,0):0;
  unsigned char*p=buf;
  unsigned char*end=buf+sz;
  int i,n,x,y,z;
  Uint16 lo=0;
  Uint32 o;
  Uint32 mru[2];
  if(lvl<0 && level_index && -lvl<=level_nindex) {
    lo=-lvl;
    lvl=level_index[~lvl];
  }
  if(lvl<0) return "Invalid level ID";
  if(!buf) return "Cannot find level";
  free(level_title);
  level_title=0;
  annihilate();
  generation_number=TY_MAXTYPE+1;
  level_version=p[0]|(p[1]<<8);

      }
    }
  }
  // skip level strings for now
  if(p>end) goto bad1;
  free(buf);
  level_id=lvl;
  level_ord=lo;
  if(level_index && !lo) {
    for(i=0;i<level_nindex;i++) if(level_index[i]==lvl) {
      level_ord=i+1;
      break;
    }
  }
  return 0;
bad1: