Added stackable function `optional()`: trying to fix travis warning

1 files changed, 1 insertions, 1 deletions

diff --git a/valua.lua b/valua.lua
index 11d4741..c9589f9 100644
--- a/valua.lua
+++ b/valua.lua
@@ -54,7 +54,7 @@ function valua:new(obj)
 	-- __call will run only when the value is validated
 	self.__call = function(t,value)
 		local res = true
-		local fres, err
+		local fres, err = nil
 
     if value == nil and t.allow_nil then
       return res, err