implement RTF_LTRPAR and RTF_RTLPAR

writerfilter/source/rtftok/rtfdocumentimpl.cxx

@@ -549,6 +549,13 @@ int RTFDocumentImpl::dispatchFlag(RTFKeyword nKeyword)
                 m_aStates.top().aParagraphSprms.insert(make_pair(NS_sprm::LN_PBrcRight, pValue));
             }
             break;
+        case RTF_LTRPAR:
+        case RTF_RTLPAR:
+            {
+                RTFValue::Pointer_t pValue(new RTFValue(nKeyword == RTF_LTRPAR ? 0 : 1));
+                m_aStates.top().aParagraphSprms.insert(make_pair(NS_sprm::LN_STextFlow, pValue));
+            }
+            break;
         default:
             OSL_TRACE("%s: TODO handle flag '%s'", OSL_THIS_FUNC, m_pCurrentKeyword->getStr());
             bParsed = false;