Fix improper glyph positioning with old fonts

Apparently this second mnXOffset is not needed, further more it breaks
some old Microsoft fonts.

Change-Id: Ice033cb6bcb3f1bdfeef31a8406a7a2e5487da97

vcl/source/gdi/sallayout.cxx

@@ -1098,7 +1098,7 @@ void GenericSalLayout::ApplyDXArray( ImplLayoutArgs& rArgs )
                 if( m_GlyphItems[j].IsClusterStart() )
                     break;
                 if( !m_GlyphItems[j].IsDiacritic() ) // #i99367# ignore diacritics
-                    nOldClusterWidth += m_GlyphItems[j].mnNewWidth -  m_GlyphItems[j].mnXOffset;
+                    nOldClusterWidth += m_GlyphItems[j].mnNewWidth;
                 nNewClusterWidth += pNewGlyphWidths[j];
             }
             const int nDiff = nNewClusterWidth - nOldClusterWidth;