video: fbdev: cirrusfb: check pixclock to avoid divide by zero
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 v4.19.238 by commit 40b13e3d85744210db13457785646634e2d056bd. For more details please see the references link.