Floating point error when Xorg Virtual display too small to accommodate monitors
## Submitted by inn..@..il.com
Assigned to **Jérôme Guelfucci**
**[Link to original bug (#15068)](https://bugzilla.xfce.org/show_bug.cgi?id=15068)**
## Description
xfce4-display-settings crashes with floating point error when monitor configuration exceeds Xorg Virtual display size.
https://forum.xfce.org/viewtopic.php?pid=51197
Version: 4.12.1
issue