sw: less vcl layout calls in SwFntObj::GetCursorOfst()

GenericSalLayout::LayoutText() calls for a single word document's
initial layout: 5 -> 4.

Change-Id: If806b6f91faef1a5ad56b3439efc12bbabe030af
Reviewed-on: https://gerrit.libreoffice.org/59973Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins

sw/source/core/txtnode/fntcache.cxx

@@ -2071,8 +2071,10 @@ TextFrameIndex SwFntObj::GetCursorOfst(SwDrawTextInfo &rInf)
     {
         m_pPrinter->SetLayoutMode( rInf.GetOut().GetLayoutMode() );
         m_pPrinter->SetDigitLanguage( rInf.GetOut().GetDigitLanguage() );
+        SwTextGlyphsKey aGlyphsKey{ m_pPrinter, rInf.GetText(), rInf.GetIdx(), rInf.GetLen() };
+        SalLayoutGlyphs* pGlyphs = lcl_CreateLayout(aGlyphsKey, m_aTextGlyphs[aGlyphsKey]);
         m_pPrinter->GetTextArray( rInf.GetText(), pKernArray.get(),
-                sal_Int32(rInf.GetIdx()), sal_Int32(rInf.GetLen()));
+                sal_Int32(rInf.GetIdx()), sal_Int32(rInf.GetLen()), nullptr, pGlyphs);
     }
     else
         rInf.GetOut().GetTextArray( rInf.GetText(), pKernArray.get(),