Fix Image duplication when no faces detected

app.py

@@ -26,6 +26,10 @@ try:
             gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
             faces, rejects, weights = face_cascade.detectMultiScale3(gray, 1.1, 4, outputRejectLevels = 1)
 
+            #Count faces  is null dont anonimize file
+            if (len(faces) < 0):
+                continue
+            
             i = 0
             for (x, y, w, h) in faces:
                 confidence = float(weights[i])