notepad: Only append .txt to missing files without a dot in them (try2)

[Rob Shearman]

2008/9/8 Alexander Nicolaysen Sørnes <alex at thehandofagony.com>:
> -            if (!lstrcmp(txtW, cmdline + lstrlen(cmdline) - lstrlen(txtW)))
> +            if (strchrW(PathFindFileNameW(cmdline), '.'))

You're using one shell helper function already so why not use
PathFindExtensionW instead?

-- 
Rob Shearman