[BugFix] Last Fm Scrobbler corrupted entries

I couldn't seem to reproduce the issue here:
https://forums.rockbox.org/index.php/topic,54165.msg252081.html#msg252081

but I figure its probably a threading issue

so we now have a mutex on the cache

and to top it all off each cached entry has a crc and length that are
checked before writing the entry to the file otherwise it is prepended
with # FAILED - so hopefully scrobbler 'parsers?' don't barf on the log

Other changes:
there is now a MRU table for tracks this should help prevent duplicates
it is configurable..

the cache buffer now no longer uses fixed chunks allowing more tracks
to be written between flushes

Change-Id: Iaab7e3f6a76abfc61130f3233379a51c9a6d12e5

0 files changed, 0 insertions, 0 deletions