Fix memory leak in Codepaster plugin

Change-Id: Id40b94c088a398daa599d91a9310c6a4accd4ed0
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/cpaster/cpasterplugin.cpp

@@ -119,6 +119,7 @@ CodepasterPlugin::CodepasterPlugin() :
 
 CodepasterPlugin::~CodepasterPlugin()
 {
+    delete m_urlOpen;
     qDeleteAll(m_protocols);
     CodepasterPlugin::m_instance = 0;
 }