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/typval.c b/src/typval.c
index db52d59..1db0d77 100644
--- a/src/typval.c
+++ b/src/typval.c
@@ -512,8 +512,8 @@
 	default:
 	    break;
     }
-    return var_check_lock(tv->v_lock, name, use_gettext)
-		    || (lock != 0 && var_check_lock(lock, name, use_gettext));
+    return value_check_lock(tv->v_lock, name, use_gettext)
+		   || (lock != 0 && value_check_lock(lock, name, use_gettext));
 }
 
 /*