tdf#115353 layout fix

Change-Id: I085b330e6539adb8b924f4d7f4cd10fb593a0da6
Reviewed-on: https://gerrit.libreoffice.org/50257Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Tamás Bunth <btomi96@gmail.com>

vcl/source/gdi/sallayout.cxx

@@ -1232,7 +1232,7 @@ void MultiSalLayout::AdjustLayout( ImplLayoutArgs& rArgs )
         rArgs.mnEndCharPos : rArgs.mnMinCharPos - 1;
     int nRunVisibleEndChar = pGlyphs[nFirstValid]->mnCharPos;
     // merge the fallback levels
-    while( nValid[0] && (nLevel > 0))
+    while( nValid[nFirstValid] && (nLevel > 0))
     {
         // find best fallback level
         for( n = 0; n < nLevel; ++n )
@@ -1267,7 +1267,7 @@ void MultiSalLayout::AdjustLayout( ImplLayoutArgs& rArgs )
                 nStartOld[0] = nStartNew[0];
                 nValid[nFirstValid] = mpLayouts[0]->GetNextGlyphs(1, &pGlyphs[nFirstValid], aPos, nStartNew[0]);
 
-                if( !nValid[0] )
+                if( !nValid[nFirstValid] )
                    break;
             }
         }