Improved use of album name when locating the album art file: replace chars that are invalid in file names; double quotes to single quotes, other invalid chars to underscore (now only very long album names could cause a problem). Also removed some unecessary code and reduced stack usage a bit.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15630 a1c6a512-1295-4272-9138-f99709370657
1 file changed