Fix issue with --print-ast and class expressions

src/prettyprinter.h

Index: src/prettyprinter.h
diff --git a/src/prettyprinter.h b/src/prettyprinter.h
index a05b61796a75ccee1b598b407e60861c92c4f6fa..1971cfe8399bc323576e5aa8699afcabae10703f 100644
--- a/src/prettyprinter.h
+++ b/src/prettyprinter.h
@@ -123,6 +123,7 @@ class AstPrinter: public PrettyPrinter {
                                     Variable* var,
                                     Handle<Object> value);
   void PrintLabelsIndented(ZoneList<const AstRawString*>* labels);
+  void PrintProperties(ZoneList<ObjectLiteral::Property*>* properties);
 
   void inc_indent() { indent_++; }
   void dec_indent() { indent_--; }