Replace download frame in Rezel Cross
Replace download frame in Toaru Majutsu to Kagaku no Ensemble
Another function replace in Kirameki School Life
Replace function in Hentai Ouji To Warawanai Neko
Replace function in Toradora! Portable
Update replace function for Toaru Majutsu to Kagaku no Ensemble.
Merge pull request #6922 from daniel229/a_few_func_replacement

A few functions replace in some games
Fix divide by zero in memcpy checks.

Happened in Resistance demo.
Remove incorrect atrac decode ptr nullcheck.

Already shown in decode test to be valid.
Keep a buffer for atrac to output the right size.

The first chunk is always smaller.  Seems to align to 0x800.
Correct the dataOff member of atrac context.
Add breakpoints to most sceAtrac mem access.
Fix seeking in atrac after the start.

Not sure the very start is right though, arg.
Return the correct next sample at the beginning.
Clamp the final sample count during decode.

Some games depend on / expect this, or else they'll let important data get
overwritten.