优化了平衡，尤其对于向后倾倒的几种极限情况进行优化

Shibo-main-TOMMY/lib/ArduinoJson/extras/tests/FailingBuilds/write_long_long.cpp

@@ -0,0 +1,15 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#define ARDUINOJSON_USE_LONG_LONG 0
+#include <ArduinoJson.h>
+
+#if defined(__SIZEOF_LONG__) && __SIZEOF_LONG__ >= 8
+#  error This test requires sizeof(long) < 8
+#endif
+
+int main() {
+  DynamicJsonDocument doc(1024);
+  doc["dummy"] = static_cast<long long>(42);
+}