action ->  YampOtherActions green

swig director exception (SWIG director method error.)

0x6f5770 <SwigDirector_eActionSlot::action_func2(std::string, std::string)+0x3ec>
0x4ac914 </usr/bin/enigma2()>
0x4aa938 <eActionMap::keyPressed(std::string const&, int, int)+0x56c>
0x49ba2c <keyEvent(eRCKey const&)+0x100>
0x526494 <eRCInput::keyPressed(eRCKey const&)+0xf4>
0x528318 <eRCDeviceInputDev::handleCode(long)+0xac>
0x52553c <eRCInputEventDriver::keyPressed(int)+0x74>
0x4b208c <eSocketNotifier::activate(int)+0xe0>
0x4b3e20 <eMainloop_native::processOneEvent(int)+0x894>
0x7d7c7c <eMainloopQt::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+0x2c8>
0x75a27570 <QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)+0x58>
0x75a2798c <QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)+0x20c>
0x75a2f2a0 <QCoreApplication::exec()+0xb0>
0x7d6fe4 <eMainloopQt::runLoop()+0x1c>
0x62c168 </usr/bin/enigma2()>
0x74f98d64 </usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x58a0)>

Traceback (most recent call last):
  File "/usr/lib/enigma2/python/enigma.py", line 6263, in __call__
    return ret(*args, **kwargs)
  File "/usr/lib/enigma2/python/Components/ActionMap.py", line 47, in action
    res = self.actions[action]()
  File "/usr/lib/enigma2/python/Plugins/Extensions/YampMusicPlayer/Yamp.py", line 927, in greenActions
    if not self.dblist.getSelection().nav:
AttributeError: 'NoneType' object has no attribute 'nav'
-------