QByteDataBuffer::getChar() - assert that buffer is not empty

Found by CodeChecker.
The getChar() method can return a garbage value if called on an empty
buffer. Considering that QByteDataBuffer is an internal class and that
there seems to be no current usage of this method, just add a Q_ASSERT
to make sure that the buffer is not empty.

Task-number: QTBUG-96303
Pick-to: 6.2
Change-Id: Iab0aee596aabafe999996f83177ca8bba16a58b6
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Ievgenii Meshcheriakov <ievgenii.meshcheriakov@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

0 files changed, 0 insertions, 0 deletions