Fix bug breaking the cache (fixes #5586)

src/cmsplugin_blurp/renderers/data_source.py

@@ -222,7 +222,6 @@ class Data(object):
 
 
     def update_content(self):
-        content = None
         if self.url.startswith('http'):
             stream, error = self.resolve_http_url()
         elif self.url.startswith('file:'):
@@ -247,7 +246,7 @@ class Data(object):
             if settings.TEMPLATE_DEBUG:
                 return msg
             return None
-        if self.refresh and content is not None:
+        if self.refresh and data is not None:
             cache.set(self.key, (data, self.now+self.refresh), 86400*12)
         log.debug('finished')
         if self.key in self.UPDATE_THREADS: