[done] Overwrite Dialog In Render Song Window

Just a little add i’d like to see in the next beta release. A couple of times I have fumbled and pressed START again after the song has been rendered, so it would be nice to have a dialog that asks for overwrite if the file already exists. :P A stupid fumble, I know, but the button is so large and temptating for pressing it… :)

www.mikseri.net/tenda/
www.mikseri.net/tyypiz/