From 7760bc9b66884684d995d4e389c522b9c17da8a6 Mon Sep 17 00:00:00 2001
From: Andreas Hubel <andi@saerdnaer.de>
Date: Fri, 27 Oct 2017 14:43:21 +0200
Subject: [PATCH] remove subtitle node when parameter empty

---
 renderlib.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/renderlib.py b/renderlib.py
index 7a12fd4..528fc2d 100644
--- a/renderlib.py
+++ b/renderlib.py
@@ -91,6 +91,10 @@ def rendertask(task):
 		parser = etree.XMLParser(huge_tree=True)
 		svg = etree.fromstring(svgstr.encode('utf-8'), parser)
 
+	if task.parameters['$subtitle'] == '':
+		child = svg.findall(".//*[@id='subtitle']")[0]
+		child.getparent().remove(child)
+
 	# frame-number counter
 	frameNr = 0