generate blank image with qwen image edit

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

generate image normally

### Actual Behavior

generate black image.

### Steps to Reproduce

I use example qwen edit workflow here https://docs.comfy.org/tutorials/image/qwen/qwen-image-edit
but comfy generate blank (black) image with error:
```
\comfyUI_portable\ComfyUI\nodes.py:1590: RuntimeWarning: invalid value encountered in cast
img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
```
It seems the issue lies with sageattention. Remove --use-sage-attention when running comfy and it generates normally.

### Debug Logs

```powershell
\comfyUI_portable\ComfyUI\nodes.py:1590: RuntimeWarning: invalid value encountered in cast
img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
```

### Other

_No response_