patch 7.4.1493
Problem:    Wrong callback invoked for zero-id messages.
Solution:   Don't use the first one-time callback when the sequence number
            doesn't match.
diff --git a/src/version.c b/src/version.c
index 51c2b81..fe5d00e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1493,
+/**/
     1492,
 /**/
     1491,