Fix crash caused by "show trace" due to incorrect usage of IP adjacency.
Fix crash caused by "show trace" due to incorrect usage of IP adjacency.

Change-Id: Ice0a6939b399eed150b0c58139b79dd4bed91113
Signed-off-by: Vengada Govindan <79d40b943c02473574addfa2514ec107ece2589e@cisco.com>

milanlenco/vpp,milanlenco/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,GabrielGanne/vpp-flowtable,chrisy/vpp,chrisy/vpp,milanlenco/vpp,FDio/vpp,milanlenco/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,FDio/vpp