Fix typo noted by igor, bug 409476

js/src/jsbool.c

@@ -126,7 +126,7 @@ Boolean(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
 
     bval = (argc != 0)
            ? BOOLEAN_TO_JSVAL(js_ValueToBoolean(argv[0]))
-           : JS_FALSE;
+           : JSVAL_FALSE;
     if (!(cx->fp->flags & JSFRAME_CONSTRUCTING)) {
         *rval = bval;
         return JS_TRUE;