merged branch beberlei/PdoSessionStorageSqlSrvFix (PR #3461)

Commits
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dc2d5a0 [HttpFoundation][Session] Fix bug in PDO Session Storage with SQLSRV making assumptions about parameters with length being OUTPUT not INPUT parameters.

Discussion
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[HttpFoundation][Session] PDO session storage sql srv fix

...ing assumptions about parameters with length being OUTPUT not INPUT parameters.

See also http://social.msdn.microsoft.com/Forums/en/sqldriverforphp/thread/c7431849-8594-4da2-bef6-8702b72391cc

Addtionally PDO Session Storage has no tests on either master or 2.0, i will provide a PR with a basic coverage in a seperate commit.

src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php

@@ -173,7 +173,7 @@ class PdoSessionStorage extends NativeSessionStorage
             $sql = "SELECT $dbDataCol FROM $dbTable WHERE $dbIdCol = :id";
 
             $stmt = $this->db->prepare($sql);
-            $stmt->bindParam(':id', $id, \PDO::PARAM_STR, 255);
+            $stmt->bindParam(':id', $id, \PDO::PARAM_STR);
 
             $stmt->execute();
             // it is recommended to use fetchAll so that PDO can close the DB cursor