fixed int64 json miss

json/json_functions.h

@@ -671,6 +671,9 @@ static bool loadjson(const jsonval& parent, const std::string& key, bool& value,
         if (a.IsInt()) {
             value = a.GetInt();
         }
+        if (a.IsInt64()) {
+            value = a.GetInt64();
+        }
         else if (a.IsBool()) {
             value = a.GetBool();
         }
@@ -716,6 +719,10 @@ static bool loadjson(const jsonval& parent, const std::string& key, std::string&
             std::stringstream stream;
             stream << a.GetInt();
             value = stream.str();
+        }else if (a.IsInt64()) {
+            std::stringstream stream;
+            stream << a.GetInt64();
+            value = stream.str();
         }
         else {
             throw Exp() << "unexpected type";