[PATCH V3] tty: fix memleak in alloc_pid

There is memleak in alloc_pid: -- unreferenced object 0xd3453a80 (size 64): comm "adbd", pid 1730, jiffies 66363 (age 6586.950s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 c2 f6 d5 00 d3 25 c1

[PATCH V3] tty: fix memleak in alloc_pid

There is memleak in alloc_pid: -- unreferenced object 0xd3453a80 (size 64): comm adbd, pid 1730, jiffies 66363 (age 6586.950s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 c2 f6 d5 00 d3 25 c1 59