ext4: make variable "count" signed
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 v4.19.249 by commit c86fce1d8c083d268103d2d19e5a9a66000a8e6f, it was introduced in version v4.19.247 by commit 78398c2b2cc14f9a9c8592cf6d334c5a479ed611. For more details please see the references link.