make database connection protected.

laravel/validator.php

@@ -6,13 +6,6 @@ use Laravel\Database\Manager as DB;
 class Validator {
 
 	/**
-	 * The database connection that should be used by the validator.
-	 *
-	 * @var Database\Connection
-	 */
-	public $connection;
-
-	/**
 	 * The array being validated.
 	 *
 	 * @var array
@@ -41,6 +34,13 @@ class Validator {
 	protected $messages = array();
 
 	/**
+	 * The database connection that should be used by the validator.
+	 *
+	 * @var Database\Connection
+	 */
+	protected $connection;
+
+	/**
 	 * The language that should be used when retrieving error messages.
 	 *
 	 * @var string