patch 8.2.4631: crash when switching window in BufWipeout autocommand

Problem:    Crash when switching window in BufWipeout autocommand.
Solution:   Put any buffer in the window to avoid it being NULL.
            (closes #10024)
diff --git a/src/version.c b/src/version.c
index 5eb4eea..9d78a0e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4631,
+/**/
     4630,
 /**/
     4629,