fix type errors detected by the new type checker

src/catalan/ParadigmsCat.gf

@@ -42,14 +42,14 @@ flags
 -- To abstract over gender names, we define the following identifiers.
 
 oper
-  Gender : Type ;
+  Gender : PType ;
 
   masculine : Gender ;
   feminine  : Gender ;
 
 -- To abstract over number names, we define the following.
 
-  Number : Type ;
+  Number : PType ;
 
   singular : Number ;
   plural   : Number ;