Fix static expressions in conditionals

Fix static expressions in conditionals

The conditions in these if statements are always true (or always false).
Remove the check in cmdebug.c, as it is unnecessary, and fix the check
in vlclient.c to actually check for a valid voltype. (via cppcheck)

Reviewed-on: https://gerrit.openafs.org/13158
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit 5cd5cd9fa8754a5af346fa6a392363b046316c75)

Change-Id: Ie3a2d6bfc99d1b5adf0524afc29dac30b655d04d
Reviewed-on: https://gerrit.openafs.org/13638
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>