Submitted by pashov, also found by csanuragjain, hake, kenta, m_Rassska, and oyc_109
transferFrom method does not check if _to argument is the zero address.
This can lead to token burns without calling the burn function, which has access control onlyRole(MINTER_BURNER_ROLE) but here this can be bypassed by passing the zero address as the value of _to.
Add a non-zero address check for _to argument in transferFrom.
toshiSat (Yieldy) confirmed and resolved 
