patch 8.0.1328: trouble when using ":term ++close" with autocmd

Problem:    Trouble when using ":term ++close" with autocmd. (Gabriel Barta)
Solution:   Use aucmd_prepbuf() and aucmd_restbuf() instead of setting curbuf.
            (closes #2339)
diff --git a/src/terminal.c b/src/terminal.c
index a4caa42..2e6b399 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -51,6 +51,7 @@
  * - implement term_setsize()
  * - Termdebug does not work when Vim build with mzscheme.  gdb hangs.
  * - MS-Windows GUI: WinBar has  tearoff item
+ * - Adding WinBar to terminal window doesn't display, text isn't shifted down.
  * - MS-Windows GUI: still need to type a key after shell exits?  #1924
  * - After executing a shell command the status line isn't redraw.
  * - What to store in a session file?  Shell at the prompt would be OK to
@@ -2172,10 +2173,13 @@
 
 		if (term->tl_finish == 'c')
 		{
+		    aco_save_T	aco;
+
 		    /* ++close or term_finish == "close" */
 		    ch_log(NULL, "terminal job finished, closing window");
-		    curbuf = term->tl_buffer;
+		    aucmd_prepbuf(&aco, term->tl_buffer);
 		    do_bufdel(DOBUF_WIPE, (char_u *)"", 1, fnum, fnum, FALSE);
+		    aucmd_restbuf(&aco);
 		    break;
 		}
 		if (term->tl_finish == 'o' && term->tl_buffer->b_nwindows == 0)