node: vector must be checked with vec_header
node: vector must be checked with vec_header

see register_node, node-name might be a vector

Change-Id: I883ec51c1fa9aa4da4ba6cba415a39bb6a4331e1
Signed-off-by: Kingwel Xie <2a62226005ff76ec1b3ca9a6f915ba889ad44cc6@ericsson.com>

vpp-dev/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp