This is only possible for two important reasons:
1) QString and QByteArray d pointers are both done with QArrayData and
that class does not care that the alignof(T) changes from 2 to 1,
so we can give the pointer from QString to QByteArray
(after adapting the allocated size, which is now double)
2) conversion from UTF16 to Latin1 always has fewer bytes (exactly half)
Change-Id: I17b2690c910f3de8db55156c6d6b5f55be06d827
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>