[TD-3197]<fix>: taosdemo and taosdump coverity scan issues. (#6207)

Co-authored-by: NShuduo Sang <sdsang@taosdata.com>

src/kit/taosdemo/taosdemo.c

@@ -1123,12 +1123,12 @@ static void appendResultBufToFile(char *resultBuf, char *resultFile)
                     __func__, __LINE__, resultFile);
             return;
         }
-  }
-
         fprintf(fp, "%s", resultBuf);
         tmfclose(fp);
+    }
 }
 
+
 static void appendResultToFile(TAOS_RES *res, char* resultFile) {
   TAOS_ROW    row = NULL;
   int         num_rows = 0;