apparmor: fix a memleak in multitransactionnew()
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 v5.10.163 by commit 935d86b29093e75b6c547d90b3979c2c2d23f1c4, it was introduced in version v4.13 by commit 1dea3b41e84c5923173fe654dcb758a5cb4a46e5. For more details please see the references link.