Fix bugs for x86 platform

- Fix incorrect input/output pointer for blur intrinsic
- Avoid the negative value for length function in bc lib

Signed-off-by: Yong Chen <yong.a.chen@intel.com>

(cherry picked from commit a0cdfe05905a5a4d2e494665809c8af9d040c116)

Change-Id: I3c6e082dffdfef122999c93d1c235e99af8c62ba
2 files changed