show error if no match

TetraParkOCR/Form1.cs

@@ -1416,7 +1416,10 @@ namespace TetraPackOCR
                         ShowTheLansRs(mMatchingStr, (double)m1 / (double)ocrTextResult.Count);
                     }
                     else
+                    {
+                        ShowTheLansRs(mMatchingStr, 0);
                         log.Info("OCR识别完成，匹配失败");
+                    }
                     Ocr_picBox.BackgroundImage = Bmp;
                     NoticePLCCompleteOCR();
                 }