Xip support broken for unar and lsar v1.10.1

[ci-macpaw]

Zero King:

$ lsar Xcode_8.xip
Xcode_8.xip: XAR
Content
Archive parsing failed! (Data is corrupted.)

[ci-macpaw]

Zero King:

You can get Xcode_8.1_beta.xip from https://developer.apple.com/download/.

$ lsar Xcode_8.1_beta.xip
Xcode_8.1_beta.xip: XAR
Content
Archive parsing failed! (Data is corrupted.)

[ci-macpaw]

Dag Ågren (DagAgren):

I'll need a link to the file to be able to test it.