session: fix session_main_get_worker_if_valid
session: fix session_main_get_worker_if_valid

Type: fix

Change-Id: Ie024792015f3c9c52102c9be03da63c79f3456af
Signed-off-by: Nathan Skrzypczak <0fa918c439baf617eab84c5ae2a48ee9db643966@gmail.com>

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