Fix the problem of invalid judgment in the command ChangeConfigurationConf. Here, value.find should be used to obtain the issued data.

Author: 张钦

examples/common/config/OcppConfig.cpp

@@ -200,8 +200,8 @@ ocpp::types::ConfigurationStatus OcppConfig::setConfiguration(const std::string&
             std::size_t key_is_interval = key.find("Interval");
             if (key_is_interval != std::string::npos)
             {
-                std::size_t value_is_negative = key.find("-");
-                if (value_is_negative)
+                std::size_t value_is_negative = value.find("-");
+                if (value_is_negative != std::string::npos)
                 {
                     ret = ConfigurationStatus::Rejected;
                 }