Assertion while stopping files (mixture of ready, not started, downloading) #608

ASSERT INFO:
/home/x/code/amule/src/CFile.cpp(495): assert ""Assert failure"" failed in GetLength(): ((IsOpened()))

BACKTRACE:
[1] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[2] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
[3] wxEvtHandler::TryHereOnly(wxEvent&)
[4] wxEvtHandler::ProcessEventLocally(wxEvent&)
[5] wxEvtHandler::ProcessEvent(wxEvent&)
[6] wxWindowBase::TryAfter(wxEvent&)
[7] wxScrollHelperEvtHandler::ProcessEvent(wxEvent&)
[8] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[9] wxMenuBase::SendEvent(int, int)
[10] g_closure_invoke
[11] g_signal_emit_valist
[12] g_signal_emit
[13] gtk_widget_activate
[14] gtk_menu_shell_activate_item
[15] g_signal_emit_valist
[16] g_signal_emit
[17] gtk_main_do_event
[18] g_main_context_iteration
[19] gtk_main_iteration
[20] wxWindow::DoPopupMenu(wxMenu*, int, int)
[21] wxWindowBase::PopupMenu(wxMenu*, int, int)
[22] wxWindowBase::PopupMenu(wxMenu*, int, int)
[23] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[24] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
[25] wxEvtHandler::TryHereOnly(wxEvent&)
[26] wxEvtHandler::ProcessEventLocally(wxEvent&)
[27] wxEvtHandler::ProcessEvent(wxEvent&)
[28] wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&)
[29] wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*)
[30] wxEvtHandler::TryHereOnly(wxEvent&)
[31] wxEvtHandler::ProcessEventLocally(wxEvent&)
[32] wxEvtHandler::ProcessEvent(wxEvent&)
[33] wxScrollHelperEvtHandler::ProcessEvent(wxEvent&)
[34] wxEvtHandler::SafelyProcessEvent(wxEvent&)
[35] g_closure_invoke
[36] g_signal_emit_valist
[37] g_signal_emit
[38] gtk_main_do_event
[39] g_main_loop_run
[40] gtk_main
[41] wxGUIEventLoop::DoRun()
[42] wxEventLoopBase::Run()
[43] wxAppConsoleBase::MainLoop()
[44] wxEntry(int&, wchar_t**)
[45] __libc_start_main