Comment 2 for bug 939127

StacktraceTop:
 matroska_segment_c::Seek (this=0x7f3648c0f910, i_date=174845848, i_time_offset=<optimized out>, i_global_position=98283412) at matroska_segment.cpp:761
 Seek (p_demux=0x7f3648003c58, i_date=174845848, f_percent=<optimized out>, p_chapter=0x0) at mkv.cpp:464
 Control(demux_t *, int, typedef __va_list_tag __va_list_tag *) (p_demux=0x7f3648003c58, i_query=<optimized out>, args=<optimized out>) at mkv.cpp:335
 demux_vaControl (args=0x7f365818fc68, i_query=<optimized out>, p_demux=<optimized out>) at input/demux.h:48
 demux_Control (p_demux=<optimized out>, i_query=<optimized out>) at input/demux.h:56