Noise and sometimes tombstone crash observed while seeking FLAC content during playback

This patch resolves two issues:
1. Segmentation fault while seeking.
2. Noise during seek.
The rootcause of both the above issue are same. Issue happens due to
memory corruption of FLAC write buffer during seek. Due to this incorrect
address we always observe noise during seek and sometimes the memory read
causes seg fault whenever the memory access goes beyond the valid range.

Change-Id: If76ca4ab614a02f8b324fc51684d5d9cf25073c8
Signed-off-by: guruprasadX, pawse <guruprasadx.pawse@intel.com>
Signed-off-by: Mazhar <mazharx.sameullah@intel.com>