patch 7.4.1627
Problem:    Channel out_cb and err_cb are not tested.
Solution:   Add a test.
diff --git a/src/version.c b/src/version.c
index fee3370..149bbaf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1627,
+/**/
     1626,
 /**/
     1625,