Squash more viced warnings

Squash more viced warnings

Get rid of more warnings in viced
  - Cast fids that we pass into the Dir package to avoid type warnings
  - Add ()s to a && b || c, to clarify its meaning - (a && b ) || c
  - Don't use %ld to print ints
  - Prototype another function from the host package

Reviewed-on: http://gerrit.openafs.org/539
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>