Fix a wrong var name in CI_Session::mark_as_temp()
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
index 5f7791d..2551e54 100644
--- a/system/libraries/Session/Session.php
+++ b/system/libraries/Session/Session.php
@@ -489,7 +489,7 @@
 					return FALSE;
 				}
 
-				$temp[$k] = $ts;
+				$temp[$k] = $v;
 			}
 
 			$_SESSION['__ci_vars'] = isset($_SESSION['__ci_vars'])