Fixed PHP7 Depecated Warnings

include/Excel/File.php

@@ -43,10 +43,10 @@ class OLE_PPS_File extends OLE_PPS
     * @param string $name The name of the file (in Unicode)
     * @see OLE::Asc2Ucs()
     */
-    function OLE_PPS_File($name)
+    function __construct($name)
     {
         $this->_tmp_dir = '';
-        $this->OLE_PPS(
+        parent::__construct(
             null,
             $name,
             OLE_PPS_TYPE_FILE,