fixed bug in MemoryUsage extension: get_engine_status() takes exactly 1 argument (0 given)

Author: pablohoffman

scrapy/contrib/memusage.py

@@ -100,6 +100,6 @@ def _send_report(self, rcpts, subject):
 
         s += "ENGINE STATUS ------------------------------------------------------- \r\n"
         s += "\r\n"
-        s += pformat(get_engine_status())
+        s += pformat(get_engine_status(self.crawler.engine))
         s += "\r\n"
         self.mail.send(rcpts, subject, s)