patch 9.0.1336: functions without arguments are not always declared properly
Problem: Functions without arguments are not always declared properly.
Solution: Use "(void)" instead of "()". (Yegappan Lakshmanan, closes #12031)
diff --git a/src/channel.c b/src/channel.c
index ee5b512..33605d4 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -4180,7 +4180,7 @@
* Return TRUE when there is any channel with a keep_open flag.
*/
int
-channel_any_keep_open()
+channel_any_keep_open(void)
{
channel_T *channel;