hack the same meaning for o:hr handling like MSO uses

This doesn't in fact change much in LO, since ShapeType::getAbsRectangle()
uses 0 as the reference size, 100% is still actually 0.

Change-Id: I81690d710402224c8477c90ad14672b593aacc24
diff --git a/oox/source/vml/vmlshapecontext.cxx b/oox/source/vml/vmlshapecontext.cxx
index ddae966..e6485f3 100644
--- a/oox/source/vml/vmlshapecontext.cxx
+++ b/oox/source/vml/vmlshapecontext.cxx
@@ -267,6 +267,15 @@ ShapeTypeContext::ShapeTypeContext( ContextHandler2Helper& rParent, ShapeType& r
    mrTypeModel.moCoordPos = lclDecodeInt32Pair( rAttribs, XML_coordorigin );
    mrTypeModel.moCoordSize = lclDecodeInt32Pair( rAttribs, XML_coordsize );
    setStyle( rAttribs.getString( XML_style, OUString() ) );
    if( lclDecodeBool( rAttribs, O_TOKEN( hr )).get( false ))
    {   // MSO's handling of o:hr width is nowhere near what the spec says:
        // - o:hrpct is not in % but in 0.1%
        // - if o:hrpct is not given, 100% width is assumed
        // - given width is used only if explicit o:hrpct="0" is given
        OUString hrpct = rAttribs.getString( O_TOKEN( hrpct ), "1000" );
        if( hrpct != "0" )
            mrTypeModel.maWidth = OUString::valueOf( hrpct.toInt32() / 10 ) + "%";
    }

    // stroke settings (may be overridden by v:stroke element later)
    mrTypeModel.maStrokeModel.moStroked = lclDecodeBool( rAttribs, XML_stroked );