Ensure strlen is not called with NULL values to avoid a deprecation w…

[dlopez-akalam]

Closes #280

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: David Lopez.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

Thank you for your contribution! We require all contributors to sign our Contributor License Agreement, and we do not have a record of your signature on file. In order for us to review and merge your code, please head over to https://www.mautic.org/contributor-agreement and complete the form. There may be a short delay while the team add you as a contributor - please be patient :). Any problems contact the Product Team on Slack (get an invite at https://mautic.org/slack). CLA has not been signed by @dlopez-akalam.

[escopecz]

Thanks! 👍

[escopecz]

@dlopez-akalam please sign CLA so this could be merged.

[codecov-commenter]

Codecov Report

Merging #281 (246c1ec) into main (0d1de9f) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##               main     #281   +/-   ##
=========================================
  Coverage     49.94%   49.94%           
- Complexity      407      408    +1     
=========================================
  Files            30       30           
  Lines           973      973           
=========================================
  Hits            486      486           
  Misses          487      487           

Impacted Files	Coverage Δ
lib/Auth/OAuth.php	0.00% <0.00%> (ø)

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[dlopez-akalam]

Hi @escopecz, I signed the agreement yesterday. I wonder it takes a few days to be validated.

[escopecz]

@cla-bot check

[cla-bot]

The CLA Bot has been sent on a mission to check against the latest list and will be back shortly with its findings!

[escopecz]

@all-contributors please add @dlopez-akalam for code

[allcontributors]

@escopecz

I've put up a pull request to add @dlopez-akalam! 🎉