Setup fails when a filename is too long

Context: https://github.com/reactos/reactos/pull/877

So i was testing around with this and it turns out when a filename is too long so it would render outside the display, the setup crashes.

Usually system file names are not that long, but it is still a bug and with the new api-* windows has right now, there could actually be an issue.

Attached is an log2lines processed logfile, the filename in question was a lot of capital As "AAA..." and you can see a line with <41414141> which explains that part.