Chapter 1: Vulkan Init Code - Use `size_t` index instead of `int` index in `destroy_swapchain()`

[Fabxx]

void VulkanEngine::destroy_swapchain()
{
	vkDestroySwapchainKHR(_device, _swapchain, nullptr);

	// destroy swapchain resources
	for (int i = 0; i < _swapchainImageViews.size(); i++) {

		vkDestroyImageView(_device, _swapchainImageViews[i], nullptr);
	}
}

should be

void VulkanEngine::destroy_swapchain()
{
	vkDestroySwapchainKHR(_device, _swapchain, nullptr);

	// destroy swapchain resources
	for (size_t i = 0; i < _swapchainImageViews.size(); i++) {

		vkDestroyImageView(_device, _swapchainImageViews[i], nullptr);
	}
}

[Mavoort]

Instead of using a regular for loop, we could also just use a for-each loop:

void VulkanEngine::destroy_swapchain()
{
	vkDestroySwapchainKHR(_device, _swapchain, nullptr);

	// destroy swapchain resources
	for (const auto& imageView : swapchainImageViews) {

		vkDestroyImageView(_device, imageView, nullptr);
	}
}