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 v4.9.318 by commit 1ff6b0727c8988f25eeb670b6c038c1120bb58dd. For more details please see the references link.