Fix for CID 1063852: Uninitialized scalar field (UNINIT_CTOR)

@camillescott @ctb or @luizirber please merge

This closes #313 

- [x] Is it mergable
- [x] Did it pass the tests?
- [N/A] If it introduce new functionality in scripts/ is it tested?
  Check for code coverage.
- [x] Is it well formatted? Look at `pep8`/`pylint`, `cppcheck`, and
  `make doc` output. Use `autopep8` and `astyle -A10` if needed.
- [x] Is it documented in the Changelog?