Comment 29 for bug 1690519

Got another boost crash:

Thread 1 "widelands" received signal SIGSEGV, Segmentation fault.
      0x0000000000cdcb3a in boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot<void (unsigned int), boost::function<void (unsigned int)> >, boost::signals2::mutex> >::operator->() const (this=0x1120fa320)
at /usr/include/boost/smart_ptr/shared_ptr.hpp:711
711 BOOST_ASSERT( px != 0 );

Will attach the save game later. This save game crashed two times after a couple of playing. Unfortunately on first crash i didn't run gbd, so i am not sure if the second crash is the same.