fixed:sometime load configure memory leak

Author: xengine-qyt

XEngine_Source/MQCore_ConfigModule/Config_Json/Config_Json.cpp

@@ -43,21 +43,12 @@ bool CConfig_Json::Config_Json_File(LPCXSTR lpszConfigFile,XENGINE_SERVERCONFIG
         Config_dwErrorCode = ERROR_MQ_MODULE_CONFIG_JSON_PARAMENT;
         return false;
     }
-    int nCount = 0;
-    XCHAR tszMsgBuffer[4096];
-    while (1)
-    {
-        int nRet = fread(tszMsgBuffer + nCount, 1, 2048, pSt_File);
-        if (nRet <= 0)
-        {
-            break;
-        }
-        nCount += nRet;
-    }
+	XCHAR tszMsgBuffer[4096] = {};
+	size_t nSize = fread(tszMsgBuffer, 1, sizeof(tszMsgBuffer), pSt_File);
     fclose(pSt_File);
 
     std::unique_ptr<Json::CharReader> const pSt_JsonReader(st_JsonBuilder.newCharReader());
-    if (!pSt_JsonReader->parse(tszMsgBuffer, tszMsgBuffer + nCount, &st_JsonRoot, &st_JsonError))
+    if (!pSt_JsonReader->parse(tszMsgBuffer, tszMsgBuffer + nSize, &st_JsonRoot, &st_JsonError))
     {
         Config_IsErrorOccur = true;
         Config_dwErrorCode = ERROR_MQ_MODULE_CONFIG_JSON_PARSE;