Code review comment for lp:~elementary-apps/audience/about-in-quicklist

Uh, it crashes for me when i use the quick-list action:

[_LOG_LEVEL_DEBUG 22:45:32.570184] Application.vala:285: The show-about-dialog action was activated

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5ba12c9 in g_object_ref_sink ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
(gdb) bt
#0 0x00007ffff5ba12c9 in g_object_ref_sink ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#1 0x00007ffff7b30463 in granite_widgets_show_about_dialog ()
   from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#2 0x00007ffff7b3139a in granite_application_real_show_about ()
   from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#3 0x00007ffff7b31419 in granite_application_show_about ()
   from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#4 0x00007ffff7b314f9 in __lambda12_ () from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#5 0x00007ffff7b31527 in ___lambda12__g_simple_action_activate ()
   from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#6 0x00007ffff5b983b8 in g_closure_invoke ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7 0x00007ffff5ba9d3d in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8 0x00007ffff5bb1a29 in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9 0x00007ffff5bb1ce2 in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007ffff65e4c35 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#11 0x00007ffff65daff4 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#12 0x00007ffff65e1ed7 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#13 0x00007ffff6602de1 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#14 0x00007ffff58c8ce5 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#15 0x00007ffff58c9048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff58c90ec in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007ffff65dd67c in g_application_run ()
   from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#18 0x00007ffff7b30c67 in granite_application_run ()
   from /usr/lib/x86_64-linux-gnu/libgranite.so.2
#19 0x00000000004154d4 in _vala_main (args=0x7fffffffdf78, args_length1=1)
    at /home/teemperor/workspace/about-in-quicklist/src/Audience.vala:721
#20 0x0000000000415511 in main (argc=1, argv=0x7fffffffdf78)
    at /home/teemperor/workspace/about-in-quicklist/src/Audience.vala:709