patch 8.1.0060: crash when autocommands delete the current buffer

Problem:    Crash when autocommands delete the current buffer. (Dominique
            Pelle)
Solution:   Check that autocommands don't change the buffer.
diff --git a/src/version.c b/src/version.c
index 68b4c26..6406e6c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    60,
+/**/
     59,
 /**/
     58,