[TD-13756]<fix>: log file open fail error.

source/util/src/tlog.c

@@ -347,12 +347,13 @@ static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
   taosThreadMutexInit(&tsLogObj.logMutex, NULL);
 
   taosUmaskFile(0);
-  tsLogObj.logHandle->pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
+  TdFilePtr pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
 
-  if (tsLogObj.logHandle->pFile == NULL) {
+  if (pFile == NULL) {
     printf("\nfailed to open log file:%s, reason:%s\n", fileName, strerror(errno));
     return -1;
   }
+  tsLogObj.logHandle->pFile = pFile;
   taosLockLogFile(tsLogObj.logHandle->pFile);
 
   // only an estimate for number of lines