[OpenAFS-port-darwin] kext 20040617 panic with 10.3.4

[Derrick J Brashear]

I'm not sure if I fixed this or not.

0x1eda4 <panic+472>:    lwz     r0,-32212(r29)
0xc17bc <vref+1088>:    lwz     r0,0(r31)
0xc1c5c <vrele+412>:    lwz     r0,104(r1)
0xcdb9c <vn_close+136>: lwz     r0,120(r1)
0x209f38 <fdfree+516>:  mr      r30,r3
0x20a030 <closef+212>:  lwz     r0,152(r1)
0x244a94 <unix_syscall+580>:    lwz     r0,164(r30)

> panic(cpu 0): vinactive: vnode still on list
> Latest stack backtrace for cpu 0:
>        Backtrace:
>           0x0008391C 0x00083E00 0x0001EDA4 0x000C17BC 0x000C1C5C
> 0x000CDB9C 0x00209F38 0x0020A030
>           0x00244A94 0x00094400 0x00000000
> Proceeding back via exception chain:
>     Exception state (sv=0x14202780)
>        PC=0x9001040C; MSR=0x0200F030; DAR=0x03EAC000; DSISR=0x42000000;
> LR=0x90A6153C; R1=0xF003EFB0; XCP=0x00000030 (0xC00 - System call)
>
> Kernel version:
> Darwin Kernel Version 7.4.0:
> Wed May 12 16:58:24 PDT 2004; root:xnu/xnu-517.7.7.obj~7/RELEASE_PPC