dnsdist: use `empty()` instead of "" check

diff --git a/pdns/dnsdistdist/dnsdist-web.cc b/pdns/dnsdistdist/dnsdist-web.cc
index 55cbc1588dd389018db7f28fe65322ac2ba81daf..91ad9110a7f42ce3f37c49c59d6119d1179a88f6 100644 (file)
--- a/pdns/dnsdistdist/dnsdist-web.cc
+++ b/pdns/dnsdistdist/dnsdist-web.cc
@@ -931,7 +931,7 @@ static void addStatsToJSONObject(Json::object& obj)
     if (entry.d_name == "special-memory-usage") {
       continue; // Too expensive for get-all
     }
-    if (entry.d_labels != "") {
+    if (entry.d_labels.empty()) {
       continue; // Skip labeled metrics to prevent duplicates
     }
     if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {