LibRaw_QIODevice::seek() bounding checks
Fix for oss-fuzz messages:
QBuffer::seek: Invalid pos: 1887732862
QBuffer::seek: Invalid pos: 1718907036
QBuffer::seek: Invalid pos: 1751549029
QBuffer::seek: Invalid pos: 1903435816
QBuffer::seek: Invalid pos: 1887732862
QBuffer::seek: Invalid pos: 1718907036
QBuffer::seek: Invalid pos: 1887731345
QBuffer::seek: Invalid pos: 1751549029
QBuffer::seek: Invalid pos: 1903435816
QBuffer::seek: Invalid pos: 1887732862
QBuffer::seek: Invalid pos: 1718907036
QBuffer::seek: Invalid pos: 1887731345
QBuffer::seek: Invalid pos: -2073663385
QBuffer::seek: Invalid pos: -2073663385
QBuffer::seek: Invalid pos: -46593
QBuffer::seek: Invalid pos: -46593
Edited by Mirco Miranda