Correct hierarchy of L, LI structure elements

in particular, don't terminate L prematurely

Change-Id: Iaf642f547b072b12ccbf861536825a2526b8798a
Reviewed-on: https://gerrit.libreoffice.org/69257
Tested-by: Jenkins
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>

drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx

@@ -1326,8 +1326,8 @@ namespace drawinglayer
                 mpPDFExtOutDevData->EndStructureElement(); // end ListItem
                 mbInListItem = false;
             }
-
-            mpPDFExtOutDevData->EndStructureElement();
+            else
+                mpPDFExtOutDevData->EndStructureElement(); // end Paragraph
         }
 
         void VclMetafileProcessor2D::processTextHierarchyBlockPrimitive2D(const primitive2d::TextHierarchyBlockPrimitive2D& rBlockPrimitive)