Private key is not used if SshHostKeys directory is absent when first starting KiTTY

[TomyLobo]

When kitty.exe is first downloaded and used, the SshHostKeys subdirectory is created as soon as it is needed. However, for some reason, if you try to connect to a server before that, the configured private key is not used.

This affects us, because we roll out a premade package with kitty plus the configuration to client machines. We'll just add an empty SshHostKeys subdirectory to the package, but I thought I'd create an issue anyway, so others with the same problem can find it.