patch 9.1.0679: Rename from w_closing to w_locked is incomplete

Problem:  Rename from w_closing to w_locked is incomplete
          (after 9.1.0678).
Solution: Rename remaining occurrences of w_closing to w_locked and
          update comments (zeertzjq).

closes: #15504

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 349269a..b2aaf1c 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2838,7 +2838,7 @@
 		int	    did_decrement;
 		buf_T	    *was_curbuf = curbuf;
 
-		// Set the w_closing flag to avoid that autocommands close the
+		// Set the w_locked flag to avoid that autocommands close the
 		// window.  And set b_locked for the same reason.
 		the_curwin->w_locked = TRUE;
 		++buf->b_locked;
diff --git a/src/structs.h b/src/structs.h
index abda3a0..847972f 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -3785,8 +3785,7 @@
     synblock_T	*w_s;		    // for :ownsyntax
 #endif
 
-    int		w_locked;	    // window is being closed, don't let
-				    // autocommands close it too.
+    int		w_locked;	    // don't let autocommands close the window
 
     frame_T	*w_frame;	    // frame containing this window
 
diff --git a/src/terminal.c b/src/terminal.c
index f801960..073f8dd 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -3647,7 +3647,7 @@
 	if (term->tl_finish == TL_FINISH_CLOSE)
 	{
 	    aco_save_T	aco;
-	    int		do_set_w_closing = term->tl_buffer->b_nwindows == 0;
+	    int		do_set_w_locked = term->tl_buffer->b_nwindows == 0;
 #ifdef FEAT_PROP_POPUP
 	    win_T	*pwin = NULL;
 
@@ -3678,11 +3678,11 @@
 	    {
 		// Avoid closing the window if we temporarily use it.
 		if (is_aucmd_win(curwin))
-		    do_set_w_closing = TRUE;
-		if (do_set_w_closing)
+		    do_set_w_locked = TRUE;
+		if (do_set_w_locked)
 		    curwin->w_locked = TRUE;
 		do_bufdel(DOBUF_WIPE, (char_u *)"", 1, fnum, fnum, FALSE);
-		if (do_set_w_closing)
+		if (do_set_w_locked)
 		    curwin->w_locked = FALSE;
 		aucmd_restbuf(&aco);
 	    }
diff --git a/src/version.c b/src/version.c
index 08b3faf..798e558 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    679,
+/**/
     678,
 /**/
     677,