libssh2_poll_channel_read made external

include/libssh2.h

@@ -350,6 +350,8 @@ LIBSSH2_API int libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel, int stream_id,
 #define libssh2_channel_read(channel, buf, buflen)					libssh2_channel_read_ex((channel), 0, (buf), (buflen))
 #define libssh2_channel_read_stderr(channel, buf, buflen)			libssh2_channel_read_ex((channel), SSH_EXTENDED_DATA_STDERR, (buf), (buflen))
 
+LIBSSH2_API int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel, int extended);
+
 LIBSSH2_API unsigned long libssh2_channel_window_read_ex(LIBSSH2_CHANNEL *channel, unsigned long *read_avail, unsigned long *window_size_initial);
 #define libssh2_channel_window_read(channel)			libssh2_channel_window_read_ex((channel), NULL, NULL)
 

src/session.c

@@ -682,7 +682,7 @@ LIBSSH2_API int libssh2_session_flag(LIBSSH2_SESSION *session, int flag, int val
  * Returns 0 if no data is waiting on channel,
  * non-0 if data is available
  */
-static int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel, int extended)
+LIBSSH2_API int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel, int extended)
 {
 	LIBSSH2_SESSION *session = channel->session;
 	LIBSSH2_PACKET *packet = session->packets.head;