to update the charstarts of following lines.
if (cursor_vpos >= 0 && this_line_bufpos
&& this_line_endpos == tlendpos)
{
+ int left = XFASTINT (w->left);
+ int *charstart_next_line
+ = FRAME_CURRENT_GLYPHS (XFRAME (WINDOW_FRAME (w)))->charstarts[this_line_vpos + 1];
+ int adjust = Z - tlendpos + 1 - charstart_next_line[left];
+ int i;
+
+ adjust_window_charstarts (w, this_line_vpos, adjust);
+
if (XFASTINT (w->width) != FRAME_WIDTH (XFRAME (WINDOW_FRAME (w))))
preserve_other_columns (w);
goto update;