test correction

tests/test_main.php

@@ -55,7 +55,7 @@ class Test_Main_Class extends BaseTest {
     function test_main_get_feedbackform_return_contact_id() {
         $this->f3->mock('GET /feedback/');
         $this->test->expect(
-            is_numeric($this->f3->get('contact_id')),
+            !is_nan($this->f3->get('contact_id')),
             "Do not get a numeric contact id"
         );
         $this->f3->clear('ERROR');  // clear any errors