Fix Coverity issue in trace_util.c (REVERSE_INULL), thanks to Damjan for highlighting this.
Fix Coverity issue in trace_util.c (REVERSE_INULL), thanks to Damjan for highlighting this.

Change-Id: I22b1dc800624042e043e7632179f6281a6ccaafc
Signed-off-by: Vengada Govindan <79d40b943c02473574addfa2514ec107ece2589e@cisco.com>

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