Round down X pos and height to nearest integer

This fixes window draw issues when compositing is enabled for un-evenly
divisible X-axis dimensions (e.g. for thirds or sixths). This script
will return a float to kwin, which X11 will balk at. When trying to
resize windows to non-integer dimensions, the window will fail to be
drawn correctly and can not be interacted with.

---

The patch described in merge request linked below does not appear to fix
this particular issue, even though it _should_. I tested using the
Archlinux `kwin` package at 5.26.2.1-2 (which should include the patch;
see below link), but the issue still persisted.

So, instead, we can round our dimensions down to an integer before it's
even sent to kwin. This may be unnecessary in the future, if the
upstream bug is ever fixed, but it will not cause any harm except for an
undetectable waste of CPU cycles to floor() the dimensions.

---

Possible upstream fix: https://invent.kde.org/plasma/kwin/-/merge_requests/3123
Archlinux kwin package: archlinux/svntogit-packages@53384fe

contents/code/tiling.js

@@ -94,10 +94,10 @@ var resizeAndMove = function(size_dividend, size_multiple, pos_dividend, pos_ind
   geo.height = workGeo.height;
 
   // horizontal position (from left edge)
-  geo.x = (workGeo.width / pos_dividend) * pos_index;
+  geo.x = Math.floor((workGeo.width / pos_dividend) * pos_index);
 
   // width
-  geo.width = (workGeo.width / size_dividend) * size_multiple;
+  geo.width = Math.floor((workGeo.width / size_dividend) * size_multiple);
 
   // HACK: unset "maximized" since kwin doesn't do it when you resize an already-maximized window with .geometry
   activeClient.setMaximize(false, false);

metadata.desktop

@@ -10,7 +10,7 @@ X-KDE-PluginInfo-Author=Zach Himsel
 X-KDE-PluginInfo-Name=Ultrawide-Tiling
 X-KDE-PluginKeyword=Ultrawide-Tiling
 X-KDE-ParentComponents=Ultrawide-Tiling
-X-KDE-PluginInfo-Version=1.0.1
+X-KDE-PluginInfo-Version=1.0.2
 
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=GPL