When tracking, ignore user abort first

To make sure as many tracking requests will be tracked as possible eg on "unload" of the page. Did not test it specifically but shouldn't cause any trouble.

piwik.php

@@ -13,6 +13,8 @@
 use Piwik\Tracker;
 use Piwik\Tracker\Handler;
 
+@ignore_user_abort(true);
+
 // Note: if you wish to debug the Tracking API please see this documentation:
 // http://developer.piwik.org/api-reference/tracking-api#debugging-the-tracker
 
@@ -28,8 +30,6 @@
 
 require_once PIWIK_INCLUDE_PATH . '/core/bootstrap.php';
 
-@ignore_user_abort(true);
-
 require_once PIWIK_INCLUDE_PATH . '/core/Plugin/Controller.php';
 require_once PIWIK_INCLUDE_PATH . '/core/Exception/NotYetInstalledException.php';
 require_once PIWIK_INCLUDE_PATH . '/core/Plugin/ControllerAdmin.php';
@@ -81,4 +81,4 @@
 
 if (ob_get_level() > 1) {
     ob_end_flush();
-}
+}