Comment 2 for bug 844904

StacktraceTop:
 gst_color_balance_list_channels (balance=0x0) at colorbalance.c:127
 empathy_video_src_get_supported_channels (src=<optimized out>) at empathy-video-src.c:341
 empathy_streamed_media_window_setup_video_input (self=0x24ea910) at empathy-streamed-media-window.c:449
 empathy_streamed_media_window_bus_message (bus=<optimized out>, message=0x2d96b10, user_data=<optimized out>) at empathy-streamed-media-window.c:2613
 gst_bus_source_dispatch (source=0x2878fd0, callback=0x427ff0 <empathy_streamed_media_window_bus_message>, user_data=0x24ea910) at gstbus.c:761