snowleopard 64 bit warning death

snowleopard 64 bit warning death

make all errors from warnings when compiling on snowleopard die

as a note, the ukernel pid, and pthread self as id changes, probably
should be revisited, but for now i have changed nothing. it should
be a separate change.

Reviewed-on: http://gerrit.openafs.org/666
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>