Only mask license if needed

[jakejackson1]

Description

Fix PHP error from occurring during license check if no license present (affects extensions).

Checklist:

• [x] I've tested the code.
• [ ] My code is easy to read, follow, and understand
• [ ] My code follows the accessibility standards.
• [ ] My code has proper inline documentation / docblocks.

Additional Comments

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.70%. Comparing base (106eb13) to head (bb5a359). Report is 7 commits behind head on hot-patch.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## hot-patch #1584 +/- ## ========================================== Coverage 75.70% 75.70% ========================================== Files 251 251 Lines 13606 13606 Branches 370 370 ========================================== Hits 10300 10300 Misses 3298 3298 Partials 8 8 ```

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