Version the po4a Build-Depends to >= 0.23 as we are using options

introduced in that version. Thanks to Sergio Gelato. Closes: #370536

debian/changelog

@@ -1,5 +1,9 @@
 dpkg (1.13.22~) UNRELEASED; urgency=low
 
+  [ Guillem Jover ]
+  * Version the po4a Build-Depends to >= 0.23 as we are using options
+    introduced in that version. Thanks to Sergio Gelato. Closes: #370536
+
   [ Updated dpkg Translations ]
   * Romanian (Eddy Petrişor).
   * Galician (Jacobo Tarrio).

debian/control

@@ -6,7 +6,7 @@ Uploaders: Frank Lichtenheld <djpig@debian.org>, Guillem Jover <guillem@debian.o
 Origin: debian
 Bugs: debbugs://bugs.debian.org
 Standards-Version: 3.7.2
-Build-Depends: debhelper (>= 4.1.81), pkg-config, po4a,
+Build-Depends: debhelper (>= 4.1.81), pkg-config, po4a (>= 0.23),
  libncurses5-dev | libncurses-dev, zlib1g-dev (>= 1:1.1.3-19.1), libbz2-dev,
  libselinux1-dev (>= 1.28-4) [!hurd-i386 !kfreebsd-i386 !kfreebsd-amd64]