write_open_telemetry plugin: Fix "unused variable" compile warning.

The variable is only used when compiling with `--enable-debug`.

diff --git a/src/write_open_telemetry.cc b/src/write_open_telemetry.cc
index aace9dd80c4532bef5d97f638911a9e626115e6b..a27ed6bdd0f69a399ae79b04912311c4fb5f0c6e 100644 (file)
--- a/src/write_open_telemetry.cc
+++ b/src/write_open_telemetry.cc
@@ -163,7 +163,7 @@ static int ot_flush_nolock(cdtime_t timeout, ot_callback_t *cb) {
         "send_buf_fill = %d;",
         CDTIME_T_TO_DOUBLE(timeout), staged_num);
 
-  if (c_avl_size(cb->staged_metrics) == 0) {
+  if (staged_num == 0) {
     cb->staged_time = cdtime();
     return 0;
   }