Refs #14737: Disable periodic HB event before deinit

Signed-off-by: Eduardo Ponz <eduardoponz@eprosima.com>

src/cpp/rtps/writer/StatefulWriter.cpp

@@ -325,7 +325,13 @@ StatefulWriter::~StatefulWriter()
         nack_response_event_ = nullptr;
     }
 
-    // This must be the next action, because free CacheChange_t from async thread.
+    if (periodic_hb_event_ != nullptr)
+    {
+        delete(periodic_hb_event_);
+        periodic_hb_event_ = nullptr;
+    }
+
+    // This must be the next action, as it frees CacheChange_t from the async thread.
     deinit();
 
     // Stop all active proxies and pass them to the pool
@@ -354,13 +360,6 @@ StatefulWriter::~StatefulWriter()
         }
     }
 
-    // Destroy heartbeat event
-    if (periodic_hb_event_ != nullptr)
-    {
-        delete(periodic_hb_event_);
-        periodic_hb_event_ = nullptr;
-    }
-
     // Delete all proxies in the pool
     for (ReaderProxy* remote_reader : matched_readers_pool_)
     {