don't bother scanning nonexistent data (tdf#141182)

There's no point scanning for non-empty cells after the last data
cell, and this avoids processing mdds structures (such as repeated
creating of flat_segment_tree).

Change-Id: Ibec324aa2de457e8439c38a561f55ced9f478899
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131059
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions