(Hun) Add SgAll to the forms

src/hungarian/NounMorphoHun.gf

@@ -458,6 +458,7 @@ oper
     SgSup => harm3 "on" "en" "ön" ;
     PlAcc => harm3 "ot" "et" "öt" ;
     SgAccStem => harm3 "o" "e" "ö" ;
+    SgAll => harm3 "hoz" "hez" "höz" ;
     PossdPl => harm1 "i" ; -- TODO figure out allomorphs
     _ => harm1 []
     } ;

src/hungarian/ParamHun.gf

@@ -72,6 +72,7 @@ param
   NumCaseStem =
     SgNom | SgAccStem | SgSup -- These may use 2-3 different stems
   | PlAcc  -- May have irregular vowel in suffix
+  | SgAll  -- May have irregular vowel in suffix
   | SgInsStem -- Instrumental and translative: -v after vowels
   | SgStem  -- Rest of the cases in Sg
   | PlStem  -- Rest of the cases in Pl
@@ -150,6 +151,7 @@ oper
     SgNom => "SgNom" ;
     SgAccStem => "SgAccStem" ;
     SgSup => "SgSup" ;
+    SgAll => "SgAll" ;
     PlAcc => "PlAcc" ;
     SgInsStem => "SgInsStem" ;
     SgStem => "SgStem" ;

src/hungarian/ResHun.gf

@@ -28,6 +28,7 @@ oper
       <Sg,Nom> => cn.s ! SgNom ;
       <Sg,Acc> => bind (cn.s ! SgAccStem) "t" ;
       <Sg,Sup> => cn.s ! SgSup ;
+      <Sg,All> => cn.s ! SgAll ;
       <Pl,Acc> => cn.s ! PlAcc ;
       <Pl,Nom> => cn.s ! PlStem ; -- don't use applyCase', it adds a BIND which breaks everything!
       <Sg,Ins|Tra> => applyCase' SgInsStem ;