Add test for empty read() calls on CakeSession

cake/libs/cake_session.php

@@ -254,7 +254,7 @@ class CakeSession {
  * @param string $name Variable name to check for
  * @return boolean True if variable is there
  */
-	public static function check($name) {
+	public static function check($name = null) {
 		if (empty($name)) {
 			return false;
 		}

cake/tests/cases/libs/cake_session.test.php

@@ -194,6 +194,16 @@ class CakeSessionTest extends CakeTestCase {
 		$this->assertEqual('value', $result);
 	}
 
+/**
+ * testReadyEmpty
+ *
+ * @author Predominant
+ * @access public
+ */
+	function testReadyEmpty() {
+		$this->assertFalse(TestCakeSession::read(''));
+	}
+
 /**
  * test writing a hash of values/
  *