Finnish NPSep form, to avoid empty Nominative forms in wrong places in case of pro drop.

lib/src/finnish/VerbFin.gf

@@ -123,7 +123,7 @@ concrete VerbFin of Verb = CatFin ** open Prelude, ResFin, StemFin in {
               }            --- definiteness of NP ?
           in cn.s ! (NCase n c)
       } ;
-    CompNP np = {s = \\_ => np.s ! NPCase Nom} ;
+    CompNP np = {s = \\_ => np.s ! NPSep} ;
     CompAdv a = {s = \\_ => a.s} ;
 
     VPSlashPrep vp prep = vp ** {c2 = prep} ;