require at least one font in order to run unit tests

libreoffice.spec

@@ -70,7 +70,7 @@ BuildRequires:  jakarta-commons-codec, jakarta-commons-httpclient, cppunit-devel
 BuildRequires:  jakarta-commons-lang, poppler-devel, fontpackages-devel, junit4
 BuildRequires:  pentaho-reporting-flow-engine, libXinerama-devel, mythes-devel
 BuildRequires:  silgraphite-devel, libwpg-devel, libwps-devel, vigra-devel
-BuildRequires:  translate-toolkit, kdelibs4-devel
+BuildRequires:  translate-toolkit, kdelibs4-devel, font(:lang=en)
 
 Patch1:  openoffice.org-2.0.2.rh188467.printingdefaults.patch
 Patch2:  openoffice.org-2.4.0.ooo86080.unopkg.bodge.patch