Bug#854204: syslinux/isolinux installation fails, so one could only create isos for uefi systems

[Enrico Zini <enrico@debian.org>]

Source: live-wrapper
Version: 0.7
Followup-For: Bug #854204

Hello,

I get the same "Not able to download syslinux-common" error on buster.

It looks like apt sees a newer version of syslinux-common without uri:
this patch fixes it for me, adding skipping of package versions with no
uri:
https://salsa.debian.org/enrico/live-wrapper/commit/5af5a747d6ee47c11dc26c4babd09dbd0844777e


Enrico

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.15.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), LANGUAGE=en_IE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled