parenthesize a Call expression when its parent is New

fix #35

lib/output.js

@@ -468,6 +468,11 @@ function OutputStream(options) {
         }
     });
 
+    PARENS(AST_Call, function(output){
+        var p = output.parent();
+        return p instanceof AST_New && p.expression === this;
+    });
+
     PARENS(AST_New, function(output){
         var p = output.parent();
         // (new Date).getTime();