Fix slider math domain error when model fails to load

Co-authored-by: matheus-rech <71096630+matheus-rech@users.noreply.github.com>

app.py

@@ -3047,7 +3047,7 @@ with gr.Blocks() as demo:
         inputs=[files_input, subject_dropdown, text_input_batch, modality_dropdown_batch, window_dropdown_batch],
         outputs=[current_slice_output, slice_slider, status_batch_text, slice_info_text, subject_dropdown, subject_info_text]
     ).then(
-        lambda max_val: gr.Slider(maximum=max_val, interactive=True),
+        lambda max_val: gr.Slider(maximum=max(max_val, 1), interactive=True),
         inputs=[slice_slider],
         outputs=[slice_slider]
     )