Tests: Rules no longer counts default settings

- Instead, assumes there are >30 default settings, which is currently and most
  likely always going to be true.

test/rules.t.cpp

@@ -45,7 +45,7 @@ int main (int, char**)
   r.set ("one.two",       12);
   r.set ("one.two.three", 123);
   r.set ("one.two.four",  124);
-  t.is ((int) r.all ().size (), 35,      "Rules all (\"\") --> 35");
+  t.ok ((int) r.all ().size () > 30,     "Rules all (\"\") --> >30");
   t.ok (r.all ("one.two").size () == 3,  "Rules all (\"one.two\") --> 3");
 
   return 0;