[Pharo-project] [NativeBoost] Generic failure errors when using nil for void* and char* arguments

Hello, I use NativeBoost to call some icu4c functions. This works fine most of the time. But now I run into the problem that when I pass nil as the argument value for one or more void* / char* parameters I get an error. When I pass a value or an empty ByteArray than it works. According to the icu4c documentation I should be able to pass NULL as an argument value. What am I missing? Jan.