patch 8.0.0103
Problem:    May not process channel readahead. (skywind)
Solution:   If there is readahead don't block on input.
diff --git a/src/proto/channel.pro b/src/proto/channel.pro
index 6a52d8b..8640fa7 100644
--- a/src/proto/channel.pro
+++ b/src/proto/channel.pro
@@ -44,6 +44,7 @@
 int channel_select_setup(int maxfd_in, void *rfds_in, void *wfds_in);
 int channel_select_check(int ret_in, void *rfds_in, void *wfds_in);
 int channel_parse_messages(void);
+int channel_any_readahead(void);
 int set_ref_in_channel(int copyID);
 ch_part_T channel_part_send(channel_T *channel);
 ch_part_T channel_part_read(channel_T *channel);