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 v5.18.6 by commit 084648a89d7c8b86563a4f64255fcfc82e31020a, it was introduced in version v5.18.3 by commit 298659c0e7074f774a794fc293df4014617b87be. For more details please see the references link.