AVISplitter_next_request duplicated hr assignation

http://doxygen.reactos.org/d6/dc8/avisplit_8c_a555babe439c4208104223a29c6efeddc.html#a555babe439c4208104223a29c6efeddc

Dupplicated hr:
Should we check first if failed?

if (rtSampleStart != rtSampleStop)
{
hr = IMediaSample_SetTime(sample, &rtSampleStart, &rtSampleStop);

hr = IAsyncReader_Request(pin->pReader, sample, streamnumber);

if (FAILED(hr))
assert(IMediaSample_Release(sample) == 0);