ipip: Unintialized return variable (coverity warning)
ipip: Unintialized return variable (coverity warning)

Type: fix

Change-Id: I008f23b5f0c7269ddd35cc747a867240fbe9c49b
Signed-off-by: Neale Ranns <b9c0e9ef0223633bc2f318425f615cf5840a0be7@cisco.com>

FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp