Revert more exactly the auto flush change

Author: fredericDelaporte

src/NHibernate/Impl/SessionImpl.cs

@@ -893,7 +893,7 @@ public void Delete(string entityName, object child, bool isCascadeDeleteEnabled,
 		}
 
 		/// <inheritdoc/>
-		public bool AutoFlushSuspended => _suspendAutoFlushCount > 0;
+		public bool AutoFlushSuspended => _suspendAutoFlushCount != 0;
 
 		/// <inheritdoc/>
 		public IDisposable SuspendAutoFlush()
@@ -915,7 +915,7 @@ public void Dispose()
 			{
 				if (_session == null)
 					throw new ObjectDisposedException("The auto-flush suspension helper has been disposed already");
-				_session._suspendAutoFlushCount --;
+				_session._suspendAutoFlushCount--;
 				_session = null;
 			}
 		}