common/async/co_waiter: Add missing header

Didn't include `associated_cancellation_slot.hpp`.

Signed-off-by: Adam C. Emerson <aemerson@redhat.com>

diff --git a/src/common/async/co_waiter.h b/src/common/async/co_waiter.h
index 098ff1f26b67afd41502f6c42efc0c5276f4f823..3239b0c2b85b6d164906c035e580600a76cb17b9 100644 (file)
--- a/src/common/async/co_waiter.h
+++ b/src/common/async/co_waiter.h
@@ -14,6 +14,7 @@
 
 #include <exception>
 #include <optional>
+#include <boost/asio/associated_cancellation_slot.hpp>
 #include <boost/asio/append.hpp>
 #include <boost/asio/async_result.hpp>
 #include <boost/asio/dispatch.hpp>