PowersUpToLevel > 0 fix breaks PowersUpToLevel=-1 upgrades

[mevitar]

Description

The game shows incorrect image of the PowersUpToLevel=-1 upgrades when placed on the building. Only the image of the first upgrade placed will be used, and all following upgrades will use the same image, even if they should be using their own.
This does not happen for builds earlier than this one, upgrade graphics show up properly.

It appears to work fine for PowersUpToLevel=1, PowersUpToLevel=2 and PowersUpToLevel=3, upgrades, but the game doesn't appear to be reading PowersUpToLevel=4.

Phobos Version

e934e4d

Conditions to reproduce

No response

INI code

[GADEPT]
Upgrades=1

[GADEP1]
PowersUpBuilding=GADEPT
PowersUpToLevel=-1

[GADEP2]
PowersUpBuilding=GADEPT
PowersUpToLevel=-1

[GADEP3]
PowersUpBuilding=GADEPT
PowersUpToLevel=-1

[GADEP4]
PowersUpBuilding=GADEPT
PowersUpToLevel=-1

Steps to reproduce

1. Use a PowersUpToLevel=-1 upgrade on a building

Expected behaviour

The upgrade gfx should show properly no matter what upgrade is placed on the structure.

Actual behaviour

The first upgrade gfx placed on the building will be used for all consecutive upgrades on that type of building, even if each of those buildings received a different upgrade.

Additional context

No response

Checklist

• The issue happens on the latest official version of Phobos and wasn't fixed yet.
• I agree to elaborate the details if requested and provide thorough testing if the bugfix is implemented.
• I added a very descriptive title to this issue.
• I used the GitHub search and read the issue list to find a similar issue and didn't find it.
• I have attached as much information as possible (screenshots, gifs, videos, debug and exception logs, etc).