Fixes warning because location is u32 and can never be netative
warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
Signed-off-by: NStephen Hemminger <sthemmin@microsoft.com>
Acked-by: NMichael Chan <michael.chan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>