(redraw_overlapping_rows): Call rif->fix_overlapping_area with new

OVERLAPS arg as redrawn part.

src/dispnew.c

@@ -4034,25 +4034,35 @@ redraw_overlapping_rows (w, yb)
       bottom_y = MATRIX_ROW_BOTTOM_Y (row);
 
       if (row->overlapping_p && i > 0 && bottom_y < yb)
+	{
+	  int overlaps = 0;
+
+	  if (MATRIX_ROW_OVERLAPS_PRED_P (row)
+	      && !MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p)
+	    overlaps |= OVERLAPS_PRED;
+	  if (MATRIX_ROW_OVERLAPS_SUCC_P (row)
+	      && !MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p)
+	    overlaps |= OVERLAPS_SUCC;
+
+	  if (overlaps)
 	    {
 	      if (row->used[LEFT_MARGIN_AREA])
-	    rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA);
+		rif->fix_overlapping_area (w, row, LEFT_MARGIN_AREA, overlaps);
 
 	      if (row->used[TEXT_AREA])
-	    rif->fix_overlapping_area (w, row, TEXT_AREA);
+		rif->fix_overlapping_area (w, row, TEXT_AREA, overlaps);
 
 	      if (row->used[RIGHT_MARGIN_AREA])
-	    rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA);
+		rif->fix_overlapping_area (w, row, RIGHT_MARGIN_AREA, overlaps);
 
-	  /* Record in neighbour rows that ROW overwrites part of their
-	     display.  */
-	  if (row->phys_ascent > row->ascent && i > 0)
+	      /* Record in neighbour rows that ROW overwrites part of
+		 their display.  */
+	      if (overlaps & OVERLAPS_PRED)
 		MATRIX_ROW (w->current_matrix, i - 1)->overlapped_p = 1;
-	  if ((row->phys_height - row->phys_ascent
-	       > row->height - row->ascent)
-	      && bottom_y < yb)
+	      if (overlaps & OVERLAPS_SUCC)
 		MATRIX_ROW (w->current_matrix, i + 1)->overlapped_p = 1;
 	    }
+	}
 
       if (bottom_y >= yb)
 	break;