fix(audio): fix sound_uninit() segfault

Co-Authored-By: João Miguel Nogueira <[email protected]>

core/src/al/miniaudio_context.cpp

@@ -101,17 +101,23 @@ class MiniaudioSource : public impl::Source
 public:
     MiniaudioSource(ma_engine& engine)
         : mEngine(engine)
+        , mSoundInitialized(false)
     {
     }
 
     ~MiniaudioSource() override
     {
         ma_sound_uninit(&mSound);
+        mSoundInitialized = false;
     }
 
     void setBuffer(Buffer buffer) override
     {
-        ma_sound_uninit(&mSound);
+        if (mSoundInitialized)
+        {
+            ma_sound_uninit(&mSound);
+            mSoundInitialized = false;
+        }
 
         // Try to dynamically cast the Buffer to a MiniaudioBuffer.
         auto miniaudioBuffer = std::static_pointer_cast<MiniaudioBuffer>(buffer);
@@ -121,6 +127,8 @@ class MiniaudioSource : public impl::Source
             CUBOS_ERROR("Failed to initialize sound from buffer");
             return;
         }
+
+        mSoundInitialized = true;
     }
 
     void setPosition(const glm::vec3& position) override
@@ -211,6 +219,7 @@ class MiniaudioSource : public impl::Source
 private:
     ma_sound mSound;
     ma_engine& mEngine;
+    bool mSoundInitialized;
 };
 
 class MiniaudioDevice : public impl::AudioDevice