staging/lustre: fix 'code maintainability' errors

Fix 'code maintainability' issues found by Coverity version 6.5.1:
Unused pointer value (UNUSED_VALUE)
Pointer returned by function is never used.
Missing varargs init or cleanup (VARARGS)
va_end was not called for variable.
Signed-off-by: Sebastien Buisson <sebastien.buisson@bull.net>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3107
Lustre-change: http://review.whamcloud.com/5944Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: John Hammond <johnlockwoodhammond@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/obdclass/lprocfs_jobstats.c

@@ -366,7 +366,6 @@ static int lprocfs_jobstats_seq_show(struct seq_file *p, void *v)
 	struct job_stat			*job = v;
 	struct lprocfs_stats		*s;
 	struct lprocfs_counter		ret;
-	struct lprocfs_counter		*cntr;
 	struct lprocfs_counter_header	*cntr_header;
 	int				i;
 
@@ -380,7 +379,6 @@ static int lprocfs_jobstats_seq_show(struct seq_file *p, void *v)
 
 	s = job->js_stats;
 	for (i = 0; i < s->ls_num; i++) {
-		cntr = lprocfs_stats_counter_get(s, 0, i);
 		cntr_header = &s->ls_cnt_header[i];
 		lprocfs_stats_collect(s, i, &ret);
 

drivers/staging/lustre/lustre/ptlrpc/pack_generic.c

@@ -2462,6 +2462,7 @@ void _debug_req(struct ptlrpc_request *req,
 			   rep_ok ? lustre_msg_get_flags(req->rq_repmsg) : -1,
 			   req->rq_status,
 			   rep_ok ? lustre_msg_get_status(req->rq_repmsg) : -1);
+	va_end(args);
 }
 EXPORT_SYMBOL(_debug_req);