CoreAudio: Try fixing a deadlock on uninit.

mini_al.h

@@ -14976,6 +14976,16 @@ void on_start_stop__coreaudio(void* pUserData, AudioUnit audioUnit, AudioUnitPro
     mal_device* pDevice = (mal_device*)pUserData;
     mal_assert(pDevice != NULL);
     
+    // There's been a report of a deadlock here when triggered by mal_device_uninit(). It looks like
+    // AudioUnitGetProprty (called below) and AudioComponentInstanceDispose (called in mal_device_uninit)
+    // can try waiting on the same lock. I'm going to try working around this by not calling any Core
+    // Audio APIs in the callback when the device has been stopped or initialized.
+    if (mal_device__get_state(pDevice) == MAL_STATE_UNINITIALIZED || mal_device__get_state(pDevice) == MAL_STATE_STOPPING) {
+        mal_stop_proc onStop = pDevice->onStop;
+        if (onStop) {
+            onStop(pDevice);
+        }
+    } else {
         UInt32 isRunning;
         UInt32 isRunningSize = sizeof(isRunning);
         OSStatus status = ((mal_AudioUnitGetProperty_proc)pDevice->pContext->coreaudio.AudioUnitGetProperty)(audioUnit, kAudioOutputUnitProperty_IsRunning, scope, element, &isRunning, &isRunningSize);
@@ -15013,6 +15023,7 @@ void on_start_stop__coreaudio(void* pUserData, AudioUnit audioUnit, AudioUnitPro
                 onStop(pDevice);
             }
         }
+    }
 }
 
 #if defined(MAL_APPLE_DESKTOP)