c4fffbd6f7
If a programmer would define a yaml like
fields:
shortcut:
country:
It would fail with message
"array_key_exists() expects parameter 2 to be array, null given" on line 275 of ..\modules\backend\classes\FormField.php
The yaml parsing returns a null. This check intercepts that null value being passed to the function and turns it into a proper array.
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