Fix Automatic conversion of false to array

[Fedik]

Pull Request for Issue #38927 .

Summary of Changes

Make sure variable is initialised as array

Testing Instructions

Please follow #38927

Actual result BEFORE applying this Pull Request

PHP warning

Expected result AFTER applying this Pull Request

No PHP warning

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[ReLater]

I have tested this item ✅ successfully on eecfd3f

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[richard67]

I have tested this item ✅ successfully on eecfd3f

I could reproduce the issue and can confirm that the patch helps.

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[richard67]

RTC

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[HLeithner]

thanks