NDPI: ignore marker tags if we have reason to believe they are incorrect

This prevents the marker values from being read incorrectly, at the
expense of a slightly longer initialization time.
NDPI: one more offset fix for files larger than 4 GB

Fixes #12367.
One more check for byte counts larger than 4GB
Merge pull request #1465 from melissalinkert/12367

NDPI: fix tile offset adjustment for files larger than 4GB