tdf#73056 doc import: table margins - unknown byte is EndCell
The problem was that the cell margin that overrides the
table defaults was only being applied to one cell,
while a range of cells might be defined.
a sprmTCellPadding is specified by a CSSA.
The CSSA starts with an ItcFirstLim, which consists of
a start and end cell. The end cell is NOT included.
Change-Id: Ia90bc28451d39d60ce343d24b02fd3661b05d950
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/92628
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>