tails-merge-suite should not try to merge empty suites
Originally created by @anonym on #9068 (Redmine)
When trying it you get the following error:
basename: missing operand
Try 'basename --help' for more information.
Error: Too few arguments for command 'copy'!
Syntax: reprepro [-C <component> ] [-A <architecture>] [-T <packagetype>] copy <destination-distribution> <source-distribution> <package-names to pull>
There have been errors!
xargs: reprepro: exited with status 255; aborting