jscript: Don't use EXPR_NEWREF in for_statement_event.

dlls/jscript/engine.c

@@ -929,7 +929,7 @@ HRESULT for_statement_eval(script_ctx_t *ctx, statement_t *_stat, return_type_t
         if(FAILED(hres))
             return hres;
     }else if(stat->begin_expr) {
-        hres = expr_eval(ctx, stat->begin_expr, EXPR_NEWREF, &rt->ei, &exprval);
+        hres = expr_eval(ctx, stat->begin_expr, 0, &rt->ei, &exprval);
         if(FAILED(hres))
             return hres;
 

dlls/jscript/tests/lang.js

@@ -798,6 +798,11 @@ for(var fi=0; fi < 4; fi++)
     ok(fi < 4, "fi = " + fi);
 ok(fi === 4, "fi !== 4");
 
+tmp = true;
+obj1 = new Object();
+for(obj1.nonexistent; tmp; tmp = false)
+    ok(!("nonexistent" in obj1), "nonexistent added to obj1");
+
 ok((void 1) === undefined, "(void 1) !== undefined");
 
 var inobj = new Object();