Fix for parenthesis error

Added parentheses as it was suggested by compiler.
error: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~' [-Werror=parentheses]

Change-Id: Ic3746d9804488411d10d460ddfda11f1fad8efef
Signed-off-by: Arseniy Antonov <arseniy.antonov@intel.com>