Update app.py

app.py

@@ -12,7 +12,7 @@ pipeline, pipeline_params = FlaxStableDiffusionPipeline.from_pretrained(
 )
 
 
-def generate_image(prompt: str,negative_prompt:str , inference_steps: int = 25, prng_seed: int = 0, guidance_scale: float = 9):
+def generate_image(prompt: str,negative_prompt:str = "" , inference_steps: int = 25, prng_seed: int = 0, guidance_scale: float = 9):
     rng = jax.random.PRNGKey(int(prng_seed))
     rng = jax.random.split(rng, jax.device_count())
     p_params = replicate(pipeline_params)