[Coverity CID :195867]Memory - corruptions in /arch/posix/core/posix_core.c

[aasthagr]

Static code scan issues seen in File: /arch/posix/core/posix_core.c
Category: Memory - corruptions
Function: ttable_get_empty_slot
Component: Architectures
CID: 195867
Please fix or provide comments to square it off in coverity in the link: https://scan9.coverity.com/reports.htm#v32951/p12996

[aescolar]

False positive, awaiting permission in Coverity to mark it as so.