Due to a flaw in the internal API, QXmlStreamReader's internal buffering
would mistake a NUL byte in the input stream for EOF during parsing, but
wouldn't set atEnd == true because it hadn't yet processed all bytes.
This resulted in an infinite loop in QXmlStreamReaderPrivate::parse.
So, instead of returning zero (false) to indicate EOF, return -1 (but in
unsigned form, ~0, to avoid ICC warnings of change of sign). In turn,
this required enlarging a few variables to avoid ~0U becoming 0xffff,
which is a valid QChar (could happen if the input is a QString, not a
QIODevice).
Task-number: QTBUG-43513
Change-Id: If5badcfd3e4176b79517da1fd108e0abb93a3fd1
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
817800ad39