[Coverity CID :195896]Memory - corruptions in /tests/net/traffic_class/src/main.c

[aasthagr]

Static code scan issues seen in File: /tests/net/traffic_class/src/main.c
Category: Memory - corruptions
Function: traffic_class_recv_data_mix_all_2
Component: Tests
CID: 195896
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[jukkar]

False positive