Don't allow speculative reads when message_out_of_band is specified.

asio/include/asio/detail/reactive_socket_service.hpp

diff --git a/asio/include/asio/detail/reactive_socket_service.hpp b/asio/include/asio/detail/reactive_socket_service.hpp
index 1db0e65..20bd512 100644
--- a/asio/include/asio/detail/reactive_socket_service.hpp
+++ b/asio/include/asio/detail/reactive_socket_service.hpp
@@ -1069,7 +1069,7 @@
     start_op(impl,
         (flags & socket_base::message_out_of_band)
           ? reactor::except_op : reactor::read_op,
-        ptr.get(), true,
+        ptr.get(), (flags & socket_base::message_out_of_band) == 0,
         (impl.protocol_.type() == SOCK_STREAM
           && buffer_sequence_adapter<asio::mutable_buffer,
             MutableBufferSequence>::all_empty(buffers)));