Fix SUMIF when having different length of arrays provided as input

[frantzmiccoli]

warning caused in some versions of PHP (observed with 7.2.3)

This is:

- [x] a bugfix
- [ ] a new feature

Checklist:

• Changes are covered by unit tests
• Code style is respected
• Commit message explains why the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
• CHANGELOG.md contains a short summary of the change
• Documentation is updated as necessary

Why this change is needed?

Self explanatory.

We now mimic the behavior observed in Microsoft Excel.

[frantzmiccoli]

I am seriously questioning Scrutinizer rating ... https://scrutinizer-ci.com/g/PHPOffice/PhpSpreadsheet/inspections/63e14be3-f5ad-4296-9917-11e24ed4c32b/code-structure/operation/PhpOffice%5CPhpSpreadsheet%5CCalculation%5CMathTrig%3A%3ASUMIF 😉

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.
If this is still an issue for you, please try to help by debugging it further and sharing your results.
Thank you for your contributions.

[frantzmiccoli]

not stale