Comment 2 for bug 838514

StacktraceTop:
 operator() (this=0x9e275490) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
 nux::ROProperty<std::string>::operator std::string (this=0x9e275484) at /usr/include/Nux-1.0/NuxCore/Property-inl.h:142
 unity::dash::ResultViewGrid::OnOnKeyNavFocusChange (this=0x9b65400, area=0x9b65400) at /build/buildd/unity-4.10.2/plugins/unityshell/src/ResultViewGrid.cpp:387
 operator() (this=0x9b74efc, _A_a1=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1851
 operator()<nux::Area* const&> (this=0x9b74ef8, _A_arg1=<optimized out>) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84