[vdr] [ANNOUNCE] VDR developer version 1.3.49

[Artur Skawina]

>> -           FadviseDrop(curpos + READCHUNK, cachedend - curpos + READCHUNK);
>> +           FadviseDrop(curpos + READCHUNK, cachedend - (curpos + READCHUNK));
>>             cachedend = curpos + READCHUNK;
> 
> Can anybody else confirm that this doesn't cause any new problems?
> I'm afraid I can't make this change for the final 1.4.0 without
> extensive testing. So unless at least three others give me a GO
> on this one, it will have to stay out of 1.4.0.

i don't think this really fixes any real problems, just a correctness issue :)
Basically the code was trying to free a bit too much data, when playing or jumping backwards -- i doubt it matters in RL. It  probably doesn't even matter when replaying an ongoing recording near the end (the only case i can think of where it actually could make noticeable difference, by forcing the new data to disk). As i said it's mostly harmless, just wanted to mention it once i got a current vdr running and before i forget about it. Certainly it doesn't deserve to hold up 1.4.0 by itself.

artur