The requirement of debhelper 7.0.50 is unrelated to the quilt issue. When using 3.0 (quilt), dpkg-source applies the quilt patches after the extraction. Therefore no build dependency on quilt is required and you don't need to call quilt in debian/rules.
The requirement of debhelper 7.0.50 is unrelated to the quilt issue. When using 3.0 (quilt), dpkg-source applies the quilt patches after the extraction. Therefore no build dependency on quilt is required and you don't need to call quilt in debian/rules.