Fix when dequeue is null

Author: justcoding121

src/EventHook/ApplicationWatcher.cs

@@ -185,6 +185,12 @@ private async Task AppConsumer()
             {
                 //blocking here until a key is added to the queue
                 var item = await appQueue.DequeueAsync();
+               
+                if(item is null)
+                {
+                    continue;
+                }
+
                 if (item is bool)
                 {
                     break;

src/EventHook/ClipboardWatcher.cs

@@ -132,6 +132,12 @@ private async Task ClipConsumerAsync()
             while (isRunning)
             {
                 var item = await clipQueue.DequeueAsync();
+
+                if (item is null)
+                {
+                    continue;
+                }
+
                 if (item is bool)
                 {
                     break;

src/EventHook/KeyboardWatcher.cs

@@ -144,6 +144,12 @@ private async Task ConsumeKeyAsync()
             {
                 //blocking here until a key is added to the queue
                 var item = await keyQueue.DequeueAsync();
+
+                if (item is null)
+                {
+                    continue;
+                }
+
                 if (item is bool)
                 {
                     break;

src/EventHook/MouseWatcher.cs

@@ -120,6 +120,12 @@ private async Task ConsumeKeyAsync()
             {
                 //blocking here until a key is added to the queue
                 var item = await mouseQueue.DequeueAsync();
+
+                if (item is null)
+                {
+                    continue;
+                }
+
                 if (item is bool)
                 {
                     break;