This PR fixes an issue in RecursiveCloner where null value properties of any type (i.e. arrays, nullable primitives) were being converted to empty objects.
An example of where this is a problem can occur when starting a raid in 3.9. The client would attempt to convert the empty object (created by the RecursiveCloner) to an Array and it would result in a JSON error.
Reviewed-on: https://dev.sp-tarkov.com/SPT-AKI/Server/pulls/338
Co-authored-by: paulov <v2k4gameplay@outlook.com>
Co-committed-by: paulov <v2k4gameplay@outlook.com>
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