patch 8.2.4281: using freed memory with :lopen and :bwipe

Problem:    Using freed memory with :lopen and :bwipe.
Solution:   Do not use a wiped out buffer.
diff --git a/src/version.c b/src/version.c
index 978e869..d8b3d4b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4281,
+/**/
     4280,
 /**/
     4279,