ipw2x00: Fix potential NULL dereference in libipw_xmit()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.247 by commit 167affc11781d7d35c4c3a7630a549ac74dd0b21. For more details please see the references link.