Fix Vulkan validation errors

Author: floppyhammer

pathfinder/gpu/vk/swap_chain.cpp

@@ -121,14 +121,16 @@ void SwapChainVk::cleanup_swapchain() {
 void SwapChainVk::destroy() {
     auto vk_device = device_->get_device();
 
+    vkQueueWaitIdle(device_->get_graphics_queue());
+    vkQueueWaitIdle(device_->get_present_queue());
+
     encoder_of_last_frame_.reset();
 
     // Clean up swap chain related resources.
     cleanup_swapchain();
 
     for (size_t i = 0; i < swapchain_images_.size(); i++) {
         vkDestroySemaphore(vk_device, render_finished_semaphores_[i], nullptr);
-        ;
     }
 
     // Clean up sync objects.

pathfinder/gpu/vk/window_builder.cpp

@@ -98,6 +98,7 @@ void WindowBuilderVk::stop_and_destroy_swapchains() {
     }
 
     primary_window_->swapchain_->destroy();
+    primary_window_->destroy();
 }
 
 uint8_t WindowBuilderVk::create_window(const Vec2I &size, const std::string &title) {