Fix/php notice error - Githubissues

[ ] Code Refactor
[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] This change requires a documentation update

[x] My code follows WordPress' coding standards
[x] I've checked to ensure there are no other open Pull Requests for the same update/change?
[x] I have performed a self-review of my own code
[ ] I have commented on my code, particularly in hard-to-understand areas
[ ] I have made corresponding changes to the documentation
[x] My changes generate no new warnings
[x] I have made perform a test that proves my fix is effective or that my feature works
Did you test this issue fix on all browsers?
[x] Chrome
[ ] Firefox
[ ] Edge
[ ] opera
Changelog entry
A changelog is not required.

themegrill / estore