Pass the property $validator as a parameter to the $callback Closure …

…in the class ClosureValidationRule

Pass the property $validator as a parameter to the $callback Closure, so that we could take advantage of the existing $validator property in the class ClosureValidationRule.

src/Illuminate/Validation/ClosureValidationRule.php

@@ -64,7 +64,7 @@ public function passes($attribute, $value)
             $this->failed = true;
 
             return $this->pendingPotentiallyTranslatedString($attribute, $message);
-        });
+        }, $this->validator);
 
         return ! $this->failed;
     }