[Coverity CID :187074] Incorrect expression in /samples/net/traffic_class/src/main.c

[mandarcthorat1]

Static code scan issues seen in File: /samples/net/traffic_class/src/main.c
Category: Incorrect expression
Function: connect_udp
Component: Samples
CID: 187074
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[jukkar]

Already fixed