Bug#525005: lintian: quilt-build-dep-but-no-series-file misleading for empty series file

[Nico Golde <nion@debian.org>]

Package: lintian
Version: 2.2.9
Severity: minor

Hi,

Tag: quilt-build-dep-but-no-series-file
Severity: normal
Certainty: certain
Info: Using quilt requires you to explicitly list all patches you want
 to apply in debian/patches/series. This package build-depends on quilt,
 but does not provide a patch list.
 .
 You should either remove the quilt build dependency or add a series
 file.

This is a bit misleading in case the series file exists but is empty
this will also be triggered. So this needs some adaption.

Cheers
Nico