Update app.py

app.py

@@ -203,7 +203,9 @@ def inference(text, seed, step_size, max_iterations, width, height, init_image,
     size=[width, height]
     texts = text
     init_weight=init_weight
-    init_image = init_image.name
+    if init_image != None
+        init_image = init_image.name
+    init_image = ""
     target_images = ""
     max_iterations = max_iterations
     model_names={"vqgan_imagenet_f16_16384": 'ImageNet 16384',"vqgan_imagenet_f16_1024":"ImageNet 1024", 'vqgan_openimages_f16_8192':'OpenImages 8912',