renderer_vulkan: Fix present mailbox shutdown sequence

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -142,7 +142,7 @@ RendererVulkan::~RendererVulkan() {
         vmaDestroyImage(instance.GetAllocator(), info.texture.image, info.texture.allocation);
     }
 
-    render_window.mailbox.reset();
+    mailbox.reset();
 }
 
 void RendererVulkan::Sync() {

src/video_core/renderer_vulkan/vk_texture_mailbox.cpp

@@ -49,9 +49,6 @@ PresentMailbox::PresentMailbox(const Instance& instance_, Swapchain& swapchain_,
 }
 
 PresentMailbox::~PresentMailbox() {
-    free_queue.Clear();
-    present_queue.Clear();
-
     const vk::Device device = instance.GetDevice();
     device.destroyCommandPool(command_pool);
     for (auto& frame : swap_chain) {
@@ -180,6 +177,9 @@ void PresentMailbox::PresentThread(std::stop_token token) {
     Common::SetCurrentThreadName("VulkanPresent");
     do {
         Frame* frame = present_queue.PopWait(token);
+        if (token.stop_requested()) {
+            continue;
+        }
         CopyToSwapchain(frame);
         free_queue.Push(frame);
     } while (!token.stop_requested());

src/video_core/renderer_vulkan/vk_texture_mailbox.h

@@ -55,10 +55,10 @@ private:
     RenderpassCache& renderpass_cache;
     vk::CommandPool command_pool;
     vk::Queue graphics_queue;
-    std::jthread present_thread;
     std::array<Frame, SWAP_CHAIN_SIZE> swap_chain{};
     Common::SPSCQueue<Frame*> free_queue{};
     Common::SPSCQueue<Frame*, true> present_queue{};
+    std::jthread present_thread;
     std::mutex swapchain_mutex;
     std::condition_variable swapchain_cv;
 };