sr: Fix the coverity issue
sr: Fix the coverity issue

Fix the coverity issue on srv/vnet/srv6/sr_localsid.c

Type: fix

Signed-off-by: Tetsuya Murakami <a47d6630afda28b3ec4a7f74049e69081014db0a@gmail.com>
Change-Id: I4aeef31cfd67cc1801ab57b94bf4f5ff3d13fd49

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