add: for ( pad = lastcol ; pad < x ; pad ++ ) fprintf ( out, "&" );
context: void latex_attach_vsep ( int x, int x2, int y, int y2){  if ( y >= lastline )    {      if ( ! last_is_hsep )	fprintf ( out, "\\\\\n" );      lastline = y2;    }  fprintf ( out, "{\\vrule}&" );  last_is_hsep = 0;  lastcol = x2;}