Fix AudioThread nullptr check

src/audio/AudioThread.cpp

@@ -449,7 +449,7 @@ void AudioThread::run() {
     if (inputQueue != nullptr) {
         inputQueue->flush();
     }
-   
+
     //Nullify currentInput...
     currentInput = nullptr;
   
@@ -486,6 +486,10 @@ void AudioThread::setActive(bool state) {
     
     std::lock_guard<std::recursive_mutex> lock(m_mutex);
 
+    if (deviceController[parameters.deviceId] == nullptr) {
+        return;
+    }
+
     if (state && !active && inputQueue) {
         deviceController[parameters.deviceId]->bindThread(this);
     } else if (!state && active) {