GS/VK: Fix crash when no device is created and vk is the selected renderer.

pcsx2-qt/MainWindow.cpp

@@ -3732,8 +3732,6 @@ void MainWindow::doDiscChange(CDVD_SourceType source, const QString& path)
 		reset_system = (message.clickedButton() == reset_button);
 	}
 
-	switchToEmulationView();
-
 	g_emu_thread->changeDisc(source, path);
 	if (reset_system)
 	{
@@ -3743,6 +3741,11 @@ void MainWindow::doDiscChange(CDVD_SourceType source, const QString& path)
 		else
 			g_emu_thread->resetVM();
 	}
+
+	// We have to do this after resetting the VM, otherwise the reset would be
+	// deferred since the VM would be running, and then VMLock::~VMLock would
+	// trample the reset state with its unpause event.
+	switchToEmulationView();
 }
 
 MainWindow::VMLock MainWindow::pauseAndLockVM()

pcsx2/GS/Renderers/Vulkan/GSDeviceVK.cpp

@@ -2254,8 +2254,11 @@ void GSDeviceVK::Destroy()
 
 	m_swap_chain.reset();
 
-	DestroySpinResources();
-	DestroyResources();
+	if (m_device != VK_NULL_HANDLE)
+	{
+		DestroySpinResources();
+		DestroyResources();
+	}
 
 	VKShaderCache::Destroy();