Fix uninitialize value warning
Fix uninitialize value warning

	Give a inital value to shut up compiler
	Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
	Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>

zhenyw/beignet,freedesktop-unofficial-mirror/beignet,wdv4758h/beignet,wdv4758h/beignet,freedesktop-unofficial-mirror/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,zhenyw/beignet,zhenyw/beignet,ignatenkobrain/beignet,ignatenkobrain/beignet,wdv4758h/beignet,wdv4758h/beignet,zhenyw/beignet,wdv4758h/beignet,ignatenkobrain/beignet,ignatenkobrain/beignet,freedesktop-unofficial-mirror/beignet,zhenyw/beignet