Merge "Fix sanitizer errors in bootstat.cpp." am: 9ddf4914

    if (needle.length() > pos) return std::string::npos;

    pos -= needle.length();

    // fuzzy match to maximum kBitErrorRate

    do {

    for (;;) {

      if (numError(pos, needle) != std::string::npos) return pos;

    } while (pos-- != 0);

      if (pos == 0) break;

      --pos;

    }

    return std::string::npos;

  }