Windows: misplaced brace in KFW_AFS_get_cred

Windows: misplaced brace in KFW_AFS_get_cred

A misplaced brace in KFW_AFS_get_cred() results in KFW_AFS_klog()
being executed twice in a row if successful.  The second attempt
could fail due to a KRB5KRB_AP_ERR_REPEAT error issued by the KDC.

Change-Id: I6364c1e378eeeeec9f66449674c8cd240f029a8a
Reviewed-on: http://gerrit.openafs.org/7626
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>