make buildworld error: field 'sysctl_ctx' has incomplete type

[Alex Hornung]

: My Dragonfly system ( 2.7-DEVELOPMENT DragonFly
: v2.7.0.54.g0754fe-DEVELOPMENT #18: Wed Apr  7 10:09:21 IST 2010 )
: paniced and dropped to ddb prompt with some "hammer ioctl" error in
: the morning. I rebooted it thinking I will get the error in the logs
: but it iwas not there in 'messages' or 'dmesg'.

On another note it would be more useful if you could type 'call dumpsys'
whenever you are dropped to the ddb> prompt, so that we can take a look at
the issue.

Cheers,
Alex Hornung