From: Zac Medico <zmedico@gentoo.org>
Date: Sun, 27 Jul 2008 01:31:33 +0000 (-0000)
Subject: Fix AsynchronousTask.removeStartListener() and removeExitListener() to return
X-Git-Tag: v2.2_rc4~26
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=c62c3473391f30855f608e478229bddfe7de161d;p=portage.git

Fix AsynchronousTask.removeStartListener() and removeExitListener() to return
early if there are no listeners.

svn path=/main/trunk/; revision=11202
---

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index cc7191ba4..fb3bd1e35 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -1642,6 +1642,8 @@ class AsynchronousTask(SlotObject):
 		self._start_listeners.append(f)
 
 	def removeStartListener(self, f):
+		if self._start_listeners is None:
+			return
 		self._start_listeners.remove(f)
 
 	def _start_hook(self):
@@ -1661,6 +1663,8 @@ class AsynchronousTask(SlotObject):
 		self._exit_listeners.append(f)
 
 	def removeExitListener(self, f):
+		if self._exit_listeners is None:
+			return
 		self._exit_listeners.remove(f)
 
 	def _wait_hook(self):