fix seed code to set user num

app.py

@@ -22,7 +22,7 @@ def model_load():
 def sdxl_process(seed, prompt, additional_prompt, negative_prompt, num_steps, guidance_scale):
     pipe = model_load()
     generator = torch.Generator("cuda")
-    # generator.manual_seed(seed)
+    generator.manual_seed(int(seed))
     
     special_prompt = 'jjj, scratch art style'
     prompt = f'{special_prompt}, {prompt}, with a black background'