Bug Fix

- t.t.cpp was throwing an error because UUID is no longer set in Task::Task
  and so the sample task t3 was 'empty', which doesn't sit well with the
  round trip testing.

src/tests/t.t.cpp

@@ -46,6 +46,7 @@ int main (int argc, char** argv)
 
   // Round-trip testing.
   Task t3;
+  t3.set ("name", "value");
   std::string before = t3.composeF4 ();
   t3.parse (before);
   std::string after = t3.composeF4 ();