Use normalize for load average values.

src/backend/common/Hashrate.cpp

@@ -30,6 +30,7 @@
 
 
 #include "backend/common/Hashrate.h"
+#include "base/io/json/Json.h"
 #include "base/tools/Chrono.h"
 #include "base/tools/Handle.h"
 #include "rapidjson/document.h"
@@ -157,13 +158,7 @@ const char *xmrig::Hashrate::format(double h, char *buf, size_t size)
 
 rapidjson::Value xmrig::Hashrate::normalize(double d)
 {
-    using namespace rapidjson;
-
-    if (!std::isnormal(d)) {
-        return Value(kNullType);
-    }
-
-    return Value(floor(d * 100.0) / 100.0);
+    return Json::normalize(d, false);
 }