Fix test

com.oracle.truffle.r.test/tests/pgsql/QuerySideEffect.R

@@ -4,11 +4,11 @@ q = select(function (x) {
              res = new.env()
              res$empno = x$empno
              res$ename = x$ename
-             res$salary = function (dol){
+             res$salary = (function (dol){
                a = dol * 89.0 / 100.0
                while (a > 1000.0) a = a * 89.0 / 100.0
                a
-             }(x$sal)
+             })(x$sal)
              res },
     where(function (x) x$sal >= minsalary,
     from(emp)))