Read only gives 0xFF on Attiny85

[Nagymadar]

The requestEvent does not work for Attiny85. It sends 0xFF only to the master back. It seems it does not even get to the requestEvent handler when the slave gets a read request.

This modification from an older version of this code still works:
https://github.com/svoisen/TinyWire

[mathiasrabe]

I have the same issue. Sad that this is not fixed for over a year now. Thanks to @acicuc, your fork is doing well.