tdf#116404 RTF: check locale if BiDi inherits Environment

RTF is a bit simplistic compared to the others, but at least
we can handle the Environment situation similarly.

Change-Id: I87bc389373275d19f1229e11ffd742836a0fd498
Reviewed-on: https://gerrit.libreoffice.org/66966
Tested-by: Jenkins
Reviewed-by: Justin Luth <justin_luth@sil.org>
diff --git a/sw/source/filter/ww8/rtfattributeoutput.cxx b/sw/source/filter/ww8/rtfattributeoutput.cxx
index 0b169f9..da67362 100644
--- a/sw/source/filter/ww8/rtfattributeoutput.cxx
+++ b/sw/source/filter/ww8/rtfattributeoutput.cxx
@@ -3490,7 +3490,11 @@ void RtfAttributeOutput::FormatFrameDirection(const SvxFrameDirectionItem& rDire
{
    if (!m_rExport.m_bOutPageDescs)
    {
        if (rDirection.GetValue() == SvxFrameDirection::Horizontal_RL_TB)
        SvxFrameDirection nDir = rDirection.GetValue();
        if (nDir == SvxFrameDirection::Environment)
            nDir = GetExport().GetDefaultFrameDirection();

        if (nDir == SvxFrameDirection::Horizontal_RL_TB)
            m_aStyles.append(OOO_STRING_SVTOOLS_RTF_RTLPAR);
        else
            m_aStyles.append(OOO_STRING_SVTOOLS_RTF_LTRPAR);