v1.22.2 Crash fix

Hey folks,

Here a very short update, to fix a crash when you sell all the furnitures from a data center.

Xavier aka Binogure

[h2]Changelog[/h2]
[h3]Bugfix[/h3]

• Salary wage raise computation error
  
• when selling a datacenter (or a studio with servers, it leads to a crash