fifo: fix send error on Cygwin when something is received in the pipe (closes #436)

ChangeLog.asciidoc

@@ -23,6 +23,8 @@ https://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 
 === Bugs fixed
 
+* fifo: fix send error on Cygwin when something is received in the pipe
+  (closes #436)
 * irc: fix errors displayed on WHOX messages received (closes #376)
 * lua: add detection of Lua 5.3
 * xfer: fix parsing of DCC chat messages (handle "\r\n" at the end of messages)

src/plugins/fifo/fifo.c

@@ -357,7 +357,7 @@ fifo_read (void *data, int fd)
     {
         if (num_read < 0)
         {
-            if (errno == EAGAIN)
+            if ((errno == EAGAIN) || (errno == ECOMM))
                 return WEECHAT_RC_OK;
 
             weechat_printf (NULL,