Fix audio clips streaming to be thread-safe when audio sources play

#786

Source/Engine/Audio/AudioSource.cpp

@@ -132,7 +132,7 @@ void AudioSource::Play()
             Clip->RequestStreamingUpdate();
 
             // If we are looping and streaming also update streaming buffers
-            if(_loop)
+            if (_loop)
                 RequestStreamingBuffersUpdate();
         }
     }
@@ -372,6 +372,7 @@ void AudioSource::Update()
     if (!UseStreaming() || SourceIDs.IsEmpty())
         return;
     auto clip = Clip.Get();
+    clip->Locker.Lock();
 
     // Handle streaming buffers queue submit (ensure that clip has loaded the first chunk with audio data)
     if (_needToUpdateStreamingBuffers && clip->Buffers[_streamingFirstChunk] != AUDIO_BUFFER_ID_INVALID)
@@ -441,6 +442,8 @@ void AudioSource::Update()
             clip->RequestStreamingUpdate();
         }
     }
+
+    clip->Locker.Unlock();
 }
 
 void AudioSource::OnEnable()