Fix ip4 udp encap length type
Fix ip4 udp encap length type

Change-Id: If666cda99a5fd92e904898ced40bcf2b5ac2d3a5
Signed-off-by: Florin Coras <c9715e5cdf0718c2e9b10678757dfb027875eba2@cisco.com>

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