Description: cdrom: fix improper type cast, which can leat to information leak References: Notes: Bugs: upstream: released (4.20-rc1) [e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276] 4.19-upstream-stable: released (4.19.3) [c8099dbf492b565a4f75ae7b8c08b76ca18c4c3f] 4.9-upstream-stable: released (4.9.138) [8dd745a8799ee01fc67b64fd33cdb44d04eb7e4c] 3.16-upstream-stable: released (3.16.62) [4d0f2564603d1ef8cce8a083751442342e9c9474] sid: released (4.18.20-1) 4.9-stretch-security: released (4.9.144-1) 3.16-jessie-security: released (3.16.64-1)