ALSA: mts64: fix possible null-ptr-defer in sndmts64interrupt
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 v4.9.337 by commit 06ec592389f2be3199779ab823c4323dcfd2121f, it was introduced in version v2.6.19 by commit 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad. For more details please see the references link.