KTar::KTarPrivate::readLonglink: Fix crash in malformed files
Summary:
QByteArray::resize doesn't work for std::numeric_limits<int>::max()
https://bugreports.qt.io/browse/QTBUG-75470
https://codereview.qt-project.org/#/c/260072/1/src/corelib/tools/qbytearray.cpp
documents that it "alwaus"works until 2^31 - 32 so use that
oss-fuzz #14397
Reviewers: apol
Reviewed By: apol
Subscribers: apol, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D20844