Init the vrequest structure correctly

Init the vrequest structure correctly

Init the vrequest structure correctly

FIXES 125355
(1.4.x only)

afs_InitReq fails to initialize the "flags" field of the vrequest structure.

Consequently the logic involving (flags & O_NONBLOCK) in afs_Analyze leads to
unpredictable results. afs_InitReq should initialize the complete vrequest
structure.

Reviewed-on: http://gerrit.openafs.org/457
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>