When sample action returns with an error, the skb has already been
freed. This patch fix a bug to make sure we don't free it again.
This bug introduced by commit ccb1352e (net: Add Open vSwitch
kernel components.)
Signed-off-by: NAndy Zhou <azhou@nicira.com>
Signed-off-by: NPravin B Shelar <pshelar@nicira.com>