Fixed regression

Author: sakno

src/DotNext.Tests/Threading/AsyncExclusiveLockTests.cs

@@ -236,5 +236,8 @@ public static void ReentrantLock()
         False(l.TryAcquire());
 
         Throws<LockRecursionException>(() => l.TryAcquire(DefaultTimeout));
+        
+        l.Release();
+        True(l.TryAcquire(DefaultTimeout));
     }
 }

src/DotNext.Tests/Threading/AsyncReaderWriterLockTests.cs

@@ -263,5 +263,8 @@ public static void ReentrantLock()
 
         Throws<LockRecursionException>(() => l.TryEnterReadLock(DefaultTimeout));
         Throws<LockRecursionException>(() => l.TryEnterWriteLock(DefaultTimeout));
+        
+        l.Release();
+        True(l.TryEnterReadLock(DefaultTimeout));
     }
 }

src/DotNext.Threading/Threading/AsyncReaderWriterLock.cs

@@ -645,6 +645,7 @@ public void Release()
                 throw new SynchronizationLockException(ExceptionMessages.NotInLock);
 
             state.ExitLock();
+            IsLockHelpByCurrentThread = false;
             suspendedCallers = DrainWaitQueue();
 
             if (IsDisposing && IsReadyToDispose)