rtf: m_aStates can be empty in the inner condition

Change-Id: Id262a3019a693f236630b798579f360c9462d12e
(cherry picked from commit 05cc87ce45fad402445c8d748817e386e56148af)

1 files changed, 7 insertions, 3 deletions

diff --git a/writerfilter/source/rtftok/rtfdocumentimpl.cxx b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
index 5cdc8e9690dc..cc1cdfba7a75 100644
--- a/writerfilter/source/rtftok/rtfdocumentimpl.cxx
+++ b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
@@ -455,11 +455,15 @@ writerfilter::Reference<Properties>::Pointer_t RTFDocumentImpl::getProperties(RT
 
         // cloneAndDeduplicate() wants to know about only a single "style", so
         // let's merge paragraph and character style properties here.
-        int nCharStyle = m_aStates.top().nCurrentCharacterStyleIndex;
-        RTFReferenceTable::Entries_t::iterator itChar = m_aStyleTableEntries.find(nCharStyle);
+        RTFReferenceTable::Entries_t::iterator itChar = m_aStyleTableEntries.end();
+        if (!m_aStates.empty())
+        {
+            int nCharStyle = m_aStates.top().nCurrentCharacterStyleIndex;
+            itChar = m_aStyleTableEntries.find(nCharStyle);
+        }
+
         RTFSprms aStyleSprms;
         RTFSprms aStyleAttributes;
-
         // Ensure the paragraph style is a flat list.
         lcl_copyFlatten(rProps, aStyleAttributes, aStyleSprms);