Remove a blocking while loop that wasn't removed when the code to

return PACKET_EAGAIN was added, but should have been.

src/channel.c

@@ -1729,7 +1729,7 @@ LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel)
     
     /* Allow channel freeing even when the socket has lost its connection */
     if (!channel->local.close && (session->socket_state == LIBSSH2_SOCKET_CONNECTED)) {
-        while ((rc = libssh2_channel_close(channel)) == PACKET_EAGAIN);
+        rc = libssh2_channel_close(channel);
         if (rc == PACKET_EAGAIN) {
             return PACKET_EAGAIN;
         }