collectd.conf(5): Document the gRPC plugin.

[collectd.git] / src / write_riemann_threshold.c

diff --git a/src/write_riemann_threshold.c b/src/write_riemann_threshold.c
index b1f7297..8567288 100644 (file)
--- a/src/write_riemann_threshold.c
+++ b/src/write_riemann_threshold.c
@@ -134,7 +134,7 @@ static int ut_check_one_threshold (const data_set_t *ds,
     int *statuses)
 { /* {{{ */
   int ret = -1;
-  int i;
+  size_t i;
   int status;
   gauge_t values_copy[ds->ds_num];
 
@@ -203,7 +203,9 @@ int write_riemann_threshold_check (const data_set_t *ds, const value_list_t *vl,
   gauge_t *values;
   int status;
 
+  assert (vl->values_len > 0);
   memset(statuses, 0, vl->values_len * sizeof(*statuses));
+
   if (threshold_tree == NULL)
          return 0;