Windows + Fusion style: Volume slider top border is not visible #1317
Description
When using the Fusion GUI style in SMPlayer, the top border line of the volume slider is not displayed.
The seek bar displays correctly, so the issue seems specific to the volume slider.
This problem appears only on Windows.
Other styles do not show this issue.
Actual behavior:
Only the volume slider fails to draw the top border.
The seek bar displays correctly, so the issue appears to be related to the vertical alignment of the volume slider.