Fixed semantic checks for Objective-C methods and fast-enumeration.

src/shared/cplusplus/AST.h

@@ -2997,7 +2997,7 @@ public:
     SpecifierAST *attributes;
 
 public: // annotations
-    Function *symbol;
+    ObjCMethod *symbol;
 
 public:
     virtual ObjCMethodPrototypeAST *asObjCMethodPrototype()
@@ -3129,6 +3129,9 @@ public:
     unsigned rparen_token;
     StatementAST *body_statement;
 
+public: // annotations
+    Block *symbol;
+
 public:
     virtual ObjCFastEnumerationAST *asObjCFastEnumeration()
     { return this; }