http: initializes a field of ConnectionManagerImpl::ActiveStream::Sta…

…te. (envoyproxy#36642)

While debugging an issue, it became clear that this field is not
properly initialized.

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Signed-off-by: Biren Roy <birenroy@google.com>

source/common/http/conn_manager_impl.h

@@ -338,7 +338,8 @@ class ConnectionManagerImpl : Logger::Loggable<Logger::Id::http>,
           : codec_saw_local_complete_(false), codec_encode_complete_(false),
             on_reset_stream_called_(false), is_zombie_stream_(false), successful_upgrade_(false),
             is_internally_destroyed_(false), is_internally_created_(false), is_tunneling_(false),
-            decorated_propagate_(true), deferred_to_next_io_iteration_(false) {}
+            decorated_propagate_(true), deferred_to_next_io_iteration_(false),
+            deferred_end_stream_(false) {}
 
       // It's possibly for the codec to see the completed response but not fully
       // encode it.