Prevent fatal php errors if phpBB is v4

[iMattPro]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.86207% with 7 lines in your changes missing coverage. Please review.

Project coverage is 95.57%. Comparing base (0bdd523) to head (1a007ab).

Files with missing lines	Patch %	Lines
helper/packager.php	73.07%	7 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #162      +/-   ##
============================================
- Coverage     97.20%   95.57%   -1.64%     
- Complexity      132      134       +2     
============================================
  Files             8        8              
  Lines           394      407      +13     
============================================
+ Hits            383      389       +6     
- Misses           11       18       +7     

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