Fix wayland fractional scaling

[lasnikr]

I am using the Wayland version of ueberzugpp in Sway, my terminal is Alacritty (but with Kitty it's the same problem).

This is how it looks when opened at the bottom:

This is how it looks when opened on the right:

This is how it looks when opened at the top left with Waybar:

This is how it looks when opened at the top left without Waybar (which is what I would expect):

I found issue #49, and it seems that the positioning is off, but in the exact opposite direction.

[jstkdng]

Can you test master and see if it works?

[lasnikr]

I used the newest commit (I have a personal github workflow for the build) but it didn't change anything at all it seems.

[jstkdng]

ok, was able to reproduce the issue, seems related to fractional scaling, will try to update