auth auth_log: csbuild unused parm unix_username
Fixes csbuild errors
Error: COMPILER_WARNING:
auth/auth_log.c: scope_hint: In function ‘log_authentication_event_json’
auth/auth_log.c:146:14: warning: unused parameter ‘unix_username’
[-Wunused-parameter]
Error: COMPILER_WARNING:
auth/auth_log.c: scope_hint: In function
‘log_authentication_event_human_readable’
auth/auth_log.c:586:14: warning: unused parameter ‘unix_username’
[-Wunused-parameter]
Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andreas Schneider <asn@samba.org>