patch 7.4.1233

Problem:    Channel command may cause a crash.
Solution:   Check for NULL argument. (Damien)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1233,
 /**/
     1232,
 /**/