#19 Doesn't recognize huge ID3v2 frames because of APIC

[sandrotosi]

Debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=413950

I don't really like huge ID3v2 frames, but some people use them... I've
seen MP3 files where someone stupid embedded a 900kb image. I think it's
called an APIC frame, attached picture.
mp3val reported this file as being broken; an investigation revealed
that it removed 900kb, the size of the APIC judging from a hex editor.
I guess mp3val could need some better understanding for ID3v2 frames to
handle such overly large frames. (Not that I'd aprove of adding such
huge images...)