ZP-1230 Reverting change: ob_start() is not required at this point.

Released under the Affero GNU General Public License (AGPL) version 3.

src/lib/wbxml/wbxmlencoder.php

@@ -486,7 +486,6 @@ class WBXMLEncoder extends WBXMLDefs {
         ZLog::Write(LOGLEVEL_DEBUG, sprintf("WBXMLEncoder->processMultipart() with %d parts to be processed", $this->getBodypartsCount()));
         $len = ob_get_length();
         $buffer = ob_get_clean();
-        ob_start();
         $nrBodyparts = $this->getBodypartsCount();
         $blockstart = (($nrBodyparts + 1) * 2) * 4 + 4;