patch 7.4.1217
Problem:    Execution of command on channel doesn't work yet.
Solution:   Implement the "ex" and "normal" commands.
diff --git a/src/misc2.c b/src/misc2.c
index 05f779f..78a7479 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -6240,6 +6240,10 @@
     /* Process the queued netbeans messages. */
     netbeans_parse_messages();
 # endif
+# ifdef FEAT_CHANNEL
+    /* Process the messages queued on channels. */
+    channel_parse_messages();
+# endif
 # if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
     /* Process the queued clientserver messages. */
     server_parse_messages();