#203 Patch to allow resizing of album art covers

[Marco Leal]

This patch is based on the patches made available here: https://sourceforge.net/p/minidlna/patches/153/. I just updated the patch to the latest release.

Apply the patch and then add this to minidlna.conf:
resize_covers=YOUR_DESIRED_SIZE_IN_PIXELS

E.g.:
resize_covers=800

If you don't add the option, album art covers will just default to the standard 160x160.

[Sérgio M. Basto]

I'd like combine this path with patch on https://sourceforge.net/p/minidlna/patches/132/ (which generates album art covers if don't exist). Both patches should use same cover_size value