Bump po4a version in Build-Depends to 0.33.1-1

As usage of UTF-8 in original man pages was causing build failures.
Closes: #473498

debian/changelog

@@ -1,6 +1,7 @@
 dpkg (1.14.18) UNRELEASED; urgency=low
 
-  *
+  * Bump po4a version in Build-Depends to 0.33.1-1, as usage of UTF-8
+    in original man pages was causing build failures. Closes: #473498
 
  -- Guillem Jover <guillem@debian.org>  Sun, 30 Mar 2008 13:04:29 +0300
 

debian/control

@@ -10,7 +10,7 @@ Homepage: http://wiki.debian.org/Teams/Dpkg
 Vcs-Browser: http://git.debian.org/?p=dpkg/dpkg.git
 Vcs-Git: git://git.debian.org/git/dpkg/dpkg.git
 Standards-Version: 3.7.3
-Build-Depends: debhelper (>= 4.1.81), pkg-config, po4a (>= 0.23),
+Build-Depends: debhelper (>= 4.1.81), pkg-config, po4a (>= 0.33.1),
  libncursesw5-dev, zlib1g-dev (>= 1:1.1.3-19.1), libbz2-dev, flex,
  libselinux1-dev (>= 1.28-4) [!hurd-i386 !kfreebsd-i386 !kfreebsd-amd64],
  libtimedate-perl, libio-string-perl