Remove a double check

Author: fredericDelaporte

src/NHibernate/Async/Cache/ReadWriteCache.cs

@@ -269,8 +269,9 @@ private Task DecrementLockAsync(object key, CacheLock @lock, CancellationToken c
 			try
 			{
 				//decrement the lock
-				@lock.Unlock(InternalCache.NextTimestamp());
-				return InternalCache.PutAsync(key, @lock, cancellationToken);
+				var cache = InternalCache;
+				@lock.Unlock(cache.NextTimestamp());
+				return cache.PutAsync(key, @lock, cancellationToken);
 			}
 			catch (Exception ex)
 			{

src/NHibernate/Cache/ReadWriteCache.cs

@@ -344,8 +344,9 @@ public bool Put(CacheKey key, object value, long txTimestamp, object version, IC
 		private void DecrementLock(object key, CacheLock @lock)
 		{
 			//decrement the lock
-			@lock.Unlock(InternalCache.NextTimestamp());
-			InternalCache.Put(key, @lock);
+			var cache = InternalCache;
+			@lock.Unlock(cache.NextTimestamp());
+			cache.Put(key, @lock);
 		}
 
 		public void Release(CacheKey key, ISoftLock clientLock)