enabled emptyRP in Scandinavian by distinguishing between RNom and RAcc ; this also made it possible to use der as the Danish RNom form

lib/src/danish/DiffDan.gf

@@ -64,7 +64,8 @@ instance DiffDan of DiffScand = open CommonScand, Prelude in {
         } ;
 
     relPron : Gender => Number => RCase => Str = \\g,n,c => case c of {
-      RNom | RPrep False => "som" ;
+      RNom => "der" ; --- could be som as well
+      RAcc | RPrep False => "som" ;
       RGen  => "hvis" ;
       RPrep _ => gennumForms "hvilken" "hvilket" "hvilke" ! gennum g n
       } ;