Windows: memset in RDR_RequestFileExtentsAsync
The logic in RDR_RequestFileExtentsAsync() made it possible
for memset() to be called multiple times on a buffer that
is already known to be up to date. Restructure the code to
make things faster.
Change-Id: Iea09b01f126a6d8915e6bf3dd3978ad4b482eb03
Reviewed-on: http://gerrit.openafs.org/6178
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>
Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>