Windows: no side effects from AFSDbgLogMsg calls

Do not perform assignments or call side-effect resulting functions
as parameters to AFSDbgLogMsg.

Reviewed-on: http://gerrit.openafs.org/9242
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit ff649d5bf51d78959de769e35eec61a5667d5939)

Change-Id: I63adaa0cb9c06e17f9523d1a56f93bebc38fe49a
Reviewed-on: http://gerrit.openafs.org/9243
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>