coverity#704860 Unchecked dynamic_cast

Change-Id: I4a6cf43eaf9626bdb1d486476d3e797fcab5ab13

1 files changed, 6 insertions, 3 deletions

diff --git a/sw/source/core/doc/docbm.cxx b/sw/source/core/doc/docbm.cxx
index 8da3bb1402c8..45a00d66cb26 100644
--- a/sw/source/core/doc/docbm.cxx
+++ b/sw/source/core/doc/docbm.cxx
@@ -541,9 +541,12 @@ namespace sw { namespace mark
             return true;
         if ( findMark(rNewName) != m_vAllMarks.end() )
             return false;
-        m_aMarkNamesSet.erase(dynamic_cast< ::sw::mark::MarkBase* >(io_pMark)->GetName());
-        m_aMarkNamesSet.insert(rNewName);
-        dynamic_cast< ::sw::mark::MarkBase* >(io_pMark)->SetName(rNewName);
+        if (::sw::mark::MarkBase* pMarkBase = dynamic_cast< ::sw::mark::MarkBase* >(io_pMark))
+        {
+            m_aMarkNamesSet.erase(pMarkBase->GetName());
+            m_aMarkNamesSet.insert(rNewName);
+            pMarkBase->SetName(rNewName);
+        }
         return true;
     }