tdf#109267: Fix crash during undo of delete inside redline insert

Change-Id: I070ce600c10f469b914cc1d6c036a55f33dc9529
diff --git a/sw/source/core/doc/DocumentRedlineManager.cxx b/sw/source/core/doc/DocumentRedlineManager.cxx
index 0baf658..1a62a0b 100644
--- a/sw/source/core/doc/DocumentRedlineManager.cxx
+++ b/sw/source/core/doc/DocumentRedlineManager.cxx
@@ -888,7 +888,12 @@ bool DocumentRedlineManager::AppendRedline( SwRangeRedline* pNewRedl, bool bCall
                                ( pNewRedl->GetContentIdx() == nullptr ) )
                                bDelete = true;
                        }
                        else if( SwComparePosition::Inside == eCmpPos || SwComparePosition::Equal == eCmpPos)
                        else if( SwComparePosition::Inside == eCmpPos )
                        {
                            bDelete = true;
                            bMerged = true;
                        }
                        else if( SwComparePosition::Equal == eCmpPos )
                            bDelete = true;

                        if( bDelete )