Classes: Fix issue with default constructor crash

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index db9071a98b97983b3650d69cd4a4571c39992ff5..68ffad289111ba677f4b0a4165149dfc1f044029 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -547,7 +547,9 @@ class ParserTraits {
                               ZoneList<ObjectLiteral::Property*>* properties,
                               int start_position, int end_position,
                               AstNodeFactory<AstConstructionVisitor>* factory);
-
+  Expression* DefaultConstructor(
+      bool call_super, Scope* scope,
+      AstNodeFactory<AstConstructionVisitor>* factory);
   Literal* ExpressionFromLiteral(
       Token::Value token, int pos, Scanner* scanner,
       AstNodeFactory<AstConstructionVisitor>* factory);