fix zero division error

app.py

@@ -164,9 +164,9 @@ def predict(pdf, confidence, generate_file):
 
     text_output = f"A total of {len(redacted_pages)} pages were redacted. \n\n The redacted page numbers were: {', '.join(redacted_pages)}. "
 
-    redaction_analysis = f"{total_redaction_proportion}% of the total area of the redacted pages was redacted. \n {content_redaction_proportion}% of the actual content of those redacted pages was redacted."
-
     if generate_file:
+        redaction_analysis = f"{total_redaction_proportion}% of the total area of the redacted pages was redacted. \n {content_redaction_proportion}% of the actual content of those redacted pages was redacted."
+
         return text_output + redaction_analysis, images, report
     else:
         return text_output, images, None