patch 8.2.1698: cannot lock a variable in legacy Vim script like in Vim9

Problem:    Cannot lock a variable in legacy Vim script like in Vim9.
Solution:   Make ":lockvar 0" work.
diff --git a/src/dict.c b/src/dict.c
index 73190c4..05281cb 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -1009,7 +1009,7 @@
 	    }
 	    else if (*action == 'f' && HI2DI(hi2) != di1)
 	    {
-		if (var_check_lock(di1->di_tv.v_lock, arg_errmsg, TRUE)
+		if (value_check_lock(di1->di_tv.v_lock, arg_errmsg, TRUE)
 			|| var_check_ro(di1->di_flags, arg_errmsg, TRUE))
 		    break;
 		clear_tv(&di1->di_tv);
@@ -1227,7 +1227,7 @@
     if (argvars[2].v_type != VAR_UNKNOWN)
 	semsg(_(e_toomanyarg), "remove()");
     else if ((d = argvars[0].vval.v_dict) != NULL
-	    && !var_check_lock(d->dv_lock, arg_errmsg, TRUE))
+	    && !value_check_lock(d->dv_lock, arg_errmsg, TRUE))
     {
 	key = tv_get_string_chk(&argvars[1]);
 	if (key != NULL)