container: fix error return value

[eriksjolund]

No description provided.

[giuseppe]

LGTM

[terinjokes]

For my future reference, when should I have used crun_make_error versus crun_error_wrap like other return locations?

[giuseppe]

crun_error_wrap is to add more context to an existing error, while crun_make_error is to create a new error (possibly starting from an errno value)

[terinjokes]

Thanks. I understand (and can see that pattern) in the other usages now.