correct retrieving return value of os.waitpid()

Lib/SocketServer.py

@@ -290,7 +290,7 @@ class ForkingMixIn:
     def collect_children(self):
 	"""Internal routine to wait for died children."""
 	while self.active_children:
-	    pid = os.waitpid(0, os.WNOHANG)
+	    pid, status = os.waitpid(0, os.WNOHANG)
 	    if not pid: break
 	    self.active_children.remove(pid)