Unmarshalling outputs: Fix incorrect address of return size.
Unmarshalling outputs: Fix incorrect address of return size.

This parameter is already a pointer. This error was not visible to users as
array return types are not currently implemented.

smaccm/camkes-tool,smaccm/camkes-tool,agacek/camkes-tool,smaccm/camkes-tool,smaccm/camkes-tool,agacek/camkes-tool,agacek/camkes-tool