message: Always inline Path::swap() function (TRIVIAL)
diff: @@ -106,7 +106,7 @@ struct PathElement {
  return *this;
  }
  - void swap(PathElement & other) noexcept
  + MLDB_ALWAYS_INLINE void swap(PathElement & other) noexcept
  {
  // NOTE: this is only possible because there are no self-referential
  // pointers (ie, this can't point to itself in its contents).
  