Comment 2 for bug 918295

StacktraceTop:
 pa_memblock_ref (b=<optimized out>) at pulsecore/memblock.c:493
 pa_memblockq_peek (bq=0x28c1f40, chunk=0x7f57d227a530) at pulsecore/memblockq.c:517
 sink_input_pop_cb (i=0x28c24d0, nbytes=816, chunk=0x7f57d227a530) at pulsecore/protocol-native.c:1577
 pa_sink_input_peek (i=0x28c24d0, slength=816, chunk=0x7f57d227a670, volume=0x7f57d227a688) at pulsecore/sink-input.c:812
 fill_mix_info (s=0x2694210, length=0x7f57d227cd18, info=0x7f57d227a670, maxinfo=32) at pulsecore/sink.c:913