patch 7.4.1322
Problem:    Crash when unletting the variable that holds the channel in a
            callback function.  (Christian Robinson)
Solution:   Increase the reference count while invoking the callback.
diff --git a/src/version.c b/src/version.c
index f8d838b..f5da6fc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -748,6 +748,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1322,
+/**/
     1321,
 /**/
     1320,