tdf#132688 diacritics broken in lines with punctuation

regression from
    commit 4b2d4f3c4a68361a6bc03c9ab110ce9376b14b20
    tdf#119227 fix freeze when copying a large bulleted list

Change-Id: I7d54b19c7a02c717426edce7896caaadf909154e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102000
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins
(cherry picked from commit 18e4367c33f327cf09985105bde583cdcc7b2a46)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/101972
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 9ec49c6c2dd58eb60ca0ac5e99edee9ee098302a)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103581
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
(cherry picked from commit 48cf4c412cc4ddeccf1d21a81b3b4859b6a79459)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103587
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/sw/source/core/txtnode/thints.cxx b/sw/source/core/txtnode/thints.cxx
index b46c3ea..5b363f2 100644
--- a/sw/source/core/txtnode/thints.cxx
+++ b/sw/source/core/txtnode/thints.cxx
@@ -2821,6 +2821,8 @@ bool SwpHints::MergePortions( SwTextNode& rNode )
                                eMerge = DIFFER;
                                break;
                            }
                            if (iter1.IsAtEnd() && iter2.IsAtEnd())
                                break;
                            if (iter1.IsAtEnd() || iter2.IsAtEnd())
                            {
                                eMerge = DIFFER;