THRIFT-1144: PHP client Attributes from private to protected

Updating private variable for persistant connections in TSocket to protected.


git-svn-id: https://svn.apache.org/repos/asf/thrift/trunk@1091897 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/php/src/transport/TSocket.php b/lib/php/src/transport/TSocket.php
index f713016..daf9020 100644
--- a/lib/php/src/transport/TSocket.php
+++ b/lib/php/src/transport/TSocket.php
@@ -90,7 +90,7 @@
    *
    * @var bool
    */
-  private $persist_ = FALSE;
+  protected $persist_ = FALSE;
 
   /**
    * Debugging on?