Python-i18n: allow None as a gettext path (searches default)

src/libcalamares/PythonJobApi.cpp

@@ -240,12 +240,12 @@ gettext_languages()
     return pyList;
 }
 
-std::string
+bp::object
 gettext_path()
 {
     // TODO: distinguish between -d runs and normal runs
     // TODO: can we detect DESTDIR-installs?
-    return std::string();
+    return bp::object();  // None
 }
 
 

src/libcalamares/PythonJobApi.h

@@ -61,7 +61,7 @@ std::string check_target_env_output( const boost::python::list& args,
 
 std::string obscure( const std::string& string );
 
-std::string gettext_path();
+boost::python::object gettext_path();
 
 boost::python::list gettext_languages();