[libvisio] add missing dep

[David Tardon]

commit 7f1941b9b4d11e75ac99febf16c053a560bbd1fe
Author: David Tardon <dtardon at redhat.com>
Date:   Fri Jan 2 18:59:08 2015 +0100

    add missing dep

 libvisio.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libvisio.spec b/libvisio.spec
index bf68458..6d3e622 100644
--- a/libvisio.spec
+++ b/libvisio.spec
@@ -14,6 +14,7 @@ BuildRequires: doxygen
 BuildRequires: gperf
 BuildRequires: help2man
 BuildRequires: perl
+BuildRequires: pkgconfig(cppunit)
 BuildRequires: pkgconfig(icu-i18n)
 BuildRequires: pkgconfig(librevenge-0.0)
 BuildRequires: pkgconfig(libxml-2.0)