checks if nsfw_content_detected exists

checks if nsfw_content_detected exists, make it compatible with v2 diffusers models, they don't come with safety_checker

template/app_advanced.py

@@ -83,7 +83,7 @@ def img_to_img(prompt, neg_prompt, img, strength, guidance, steps, width, height
 def replace_nsfw_images(results):
 
     for i in range(len(results.images)):
-      if results.nsfw_content_detected[i]:
+      if 'nsfw_content_detected' in results and results.nsfw_content_detected[i]:
         results.images[i] = Image.open("nsfw.png")
     return results.images[0]