CLEANUP: channel: fix comment in ci_putblk.
The comment is outdated and refer to an old code.
Should be backported until branch 1.5
diff --git a/src/channel.c b/src/channel.c
index ba8ab63..c324673 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -152,8 +152,9 @@
max = channel_recv_limit(chn);
if (unlikely(len > max - c_data(chn))) {
/* we can't write this chunk right now because the buffer is
- * almost full or because the block is too large. Return the
- * available space or -2 if impossible.
+ * almost full or because the block is too large. Returns
+ * -3 if block is too large for this buffer. Or -1 if the
+ * room left is not large enough.
*/
if (len > max)
return -3;