sw_redlinehide: fix crashes in SwEditWin Surrounding functions

These foolish functions write into the shell cursor!

But the shell cursor's node isn't necessarily the same as before with
merged paragraphs, so could crash with out of bounds indexes.

Better use Push()/Pop().

Change-Id: I4fd0e2aa915b6c5448772a2c766848607bbf5aaa
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131041
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit aac9bd235e65b27faf63e64bba3ecd94837381d6)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/131127
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

0 files changed, 0 insertions, 0 deletions