Remove empty inputs

app.py

@@ -87,6 +87,8 @@ def generate_for_prompt(input_text, state, ret_scale_factor, num_words, temperat
     # If an image was uploaded, prepend it to the model.
     model_inputs = chat_history
     model_inputs.append(input_prompt)
+    # Remove empty text.
+    model_inputs = [s for s in model_inputs if len(s) > 0]
 
     top_p = 1.0
     if temperature != 0.0:
@@ -99,7 +101,6 @@ def generate_for_prompt(input_text, state, ret_scale_factor, num_words, temperat
                                                         num_inference_steps=50)
     print('model_outputs', model_outputs, ret_scale_factor, flush=True)
 
-    im_names = []
     response = ''
     text_outputs = []
     for output_i, p in enumerate(model_outputs):