"cutout via dest-in" plan should take isLittleEndian into account

[kapouer]

The plan is 5 and fails when isLittleEndian is true ?7
https://buildd.debian.org/status/fetch.php?pkg=node-sharp&arch=s390x&ver=0.35.4-1&stamp=1789777112&raw=0

[lovell]

Thanks for reporting, fixed via 22b584d