patch 7.4.1331

Problem:    Crash when closing the channel in a callback. (Christian J.
            Robinson)
Solution:   Take the callback out of the list before invoking it.

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1331,
 /**/
     1330,
 /**/