Settings are not saved if wiisxr folder is missing

[n00ris]

Hello,
if the folder wiisxr is missing in the root of the SD card, it is not created, if you save settings to the SD card from the GUI (and without it the settings.xml is not created, too).
But the GUI says it successfully saved the settings.

Tested with dol from commit 9519304 (Revert ppc for now).

Not tested with USB device.

[Mystro256]

Odd, this shouldn't happen as it should fail when attempting to open the file. It must be a bug in the filesystem library.

Either way, I added another check to see if the directory exists before trying to open the file for writing.