[Linux] locale issue still present

[guzzard]

I don't think #1466 solved the locale issues in #710 fully. This is what opening the toon town scen for the second time looks like with Swedish locale.

To reproduce:

1. start editor with Swedish locale set
2. open scene -> looks OK
3. close scene
4. reopen scene -> looks corrupted

Running the editor with LC_NUMERIC=C solves the issues.