Fix another parser issue with generic function types

pkg/analyzer/lib/src/generated/parser.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.parser;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 2076 matching lines @@
             TokenType.EQ,
             TokenType.COMMA,
             TokenType.SEMICOLON
           ])) {
         if (returnType is! GenericFunctionType) {
           _reportErrorForNode(ParserErrorCode.VOID_VARIABLE, returnType);
         }
         return astFactory.topLevelVariableDeclaration(
             commentAndMetadata.comment,
             commentAndMetadata.metadata,
-            parseVariableDeclarationListAfterType(
-                null, _validateModifiersForTopLevelVariable(modifiers), null),
+            parseVariableDeclarationListAfterType(null,
+                _validateModifiersForTopLevelVariable(modifiers), returnType),
             _expect(TokenType.SEMICOLON));
       } else {
         //
         // We have found an error of some kind. Try to recover.
         //
         _reportErrorForToken(
             ParserErrorCode.EXPECTED_EXECUTABLE, _currentToken);
         return null;
       }
     } else if ((keyword == Keyword.GET || keyword == Keyword.SET) &&
@@ skipping 6449 matching lines @@
     }
     if (modifiers.finalKeyword != null) {
       _reportErrorForToken(
           ParserErrorCode.FINAL_TYPEDEF, modifiers.finalKeyword);
     }
     if (modifiers.varKeyword != null) {
       _reportErrorForToken(ParserErrorCode.VAR_TYPEDEF, modifiers.varKeyword);
     }
   }
 }