Dedup refactoring

Author: odersky

compiler/src/dotty/tools/dotc/transform/TreeChecker.scala

@@ -248,12 +248,9 @@ class TreeChecker extends Phase with SymTransformer {
       // case tree: untpd.Ident =>
       // case tree: untpd.Select =>
       // case tree: untpd.Bind =>
-      case vd : ValDef =>
-        vd.forceFields()
-        assertIdentNotJavaClass(vd)
-      case dd : DefDef =>
-        dd.forceFields()
-        assertIdentNotJavaClass(dd)
+      case md: ValOrDefDef =>
+        md.forceFields()
+        assertIdentNotJavaClass(md)
       // case tree: untpd.TypeDef =>
       case Apply(fun, args) =>
         assertIdentNotJavaClass(fun)