patch 7.4.1621
Problem:    Channel test doesn't work with Python 2.6.
Solution:   Add number in formatting placeholder. (Wiredool)
diff --git a/src/version.c b/src/version.c
index 95067e9..cb8b971 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1621,
+/**/
     1620,
 /**/
     1619,