Bug#793558: udpkg: asprintf failure handling

[Guillem Jover <guillem@debian.org>]

Package: udpkg
Version: 1.17
Severity: normal

Hi!

With commit c13d9c8529d2e1b09767b5f0b6a524721c9951ec to udpkg, there
is a new error handling for asprintf(), moved into the new xasprintf(),
but xasprintf() can still return NULL in some cases, which could end up
with segfaults or bad behavior. It should never return NULL.

Thanks,
Guillem