cppcheck: fix inefficient checking

Change-Id: If015900345304a9545ab0b66c6998a9d6bad9d1f
diff --git a/writerfilter/source/rtftok/rtfdocumentimpl.cxx b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
index 2a33d96..7c4f545 100644
--- a/writerfilter/source/rtftok/rtfdocumentimpl.cxx
+++ b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
@@ -513,7 +513,7 @@ void RTFDocumentImpl::sectBreak(bool bFinal = false)
        dispatchFlag(RTF_PARD);
        dispatchSymbol(RTF_PAR);
    }
    while (m_nHeaderFooterPositions.size())
    while (!m_nHeaderFooterPositions.empty())
    {
        std::pair<Id, sal_uInt32> aPair = m_nHeaderFooterPositions.front();
        m_nHeaderFooterPositions.pop();
@@ -4563,7 +4563,7 @@ int RTFDocumentImpl::popState()
        case DESTINATION_SHPPICT:
        case DESTINATION_SHAPE:
            m_aStates.top().aFrame = aState.aFrame;
            if (aState.nDestinationState == DESTINATION_SHPPICT && m_aStates.size() && m_aStates.top().nDestinationState == DESTINATION_LISTPICTURE)
            if (aState.nDestinationState == DESTINATION_SHPPICT && !m_aStates.empty() && m_aStates.top().nDestinationState == DESTINATION_LISTPICTURE)
            {
                RTFSprms aAttributes;
                aAttributes.set(NS_ooxml::LN_CT_NumPicBullet_numPicBulletId, RTFValue::Pointer_t(new RTFValue(m_nListPictureId++)));
@@ -4609,7 +4609,7 @@ int RTFDocumentImpl::popState()
        m_bHasFootnote = false;
    }

    if (m_aStates.size())
    if (!m_aStates.empty())
    {
        m_aStates.top().nCells = aState.nCells;
        m_aStates.top().aTableCellsSprms = aState.aTableCellsSprms;