[Bug] Border isn't aligned when showing an image

[igorlfs]

Describe the bug Plotting an image misaligns the window's border.

To Reproduce

1. Enable borders (I think it's the default);
2. Try to plot an image.

Expected behavior The border is displayed around the image.

Screenshots

Desktop

• OS: Linux, using kitty as an image provider (on Wayland, so I can't test Ueberzug)
• Version:

  NVIM v0.8.0-dev-994-g5ff2ea6687
  Build type: RelWithDebInfo
  LuaJIT 2.1.0-beta3