patch 7.4.1623

Problem:    All Channels share the message ID, it keeps getting bigger.
Solution:   Use a message ID per channel.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1623,
 /**/
     1622,
 /**/