fs.ftruncate cannot truncate to lengths > 2GB

[animetosho]

• Version: 10.x
• Platform: all
• Subsystem: fs

fs.ftruncate, in Node 10, attempts to do some length checking, which I don't recall being present in earlier versions of Node (v6 I think?). As somewhat alluded to in the comment there, this breaks any attempt to truncate (or allocate, in my particular case) a file to more than 2GB.

[mscdex]

/cc @BridgeAR

[animetosho]

Thank you!