Windows: fail if pSrcParentObject cannot be resolved

Windows: fail if pSrcParentObject cannot be resolved

In AFSSetFileLinkInfo and AFSSetRenameInfo return STATUS_INVALID_PARAMETER
if pSrcParentObject cannot be determined.  Otherwise, a NULL pointer
dereference will occur.

Change-Id: I0e265433aa85066005e90b3584f8e865c5be79c8
Reviewed-on: http://gerrit.openafs.org/9807
Reviewed-by: Peter Scott <pscott@kerneldrivers.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>