Get libretro integration working again.

- Fixes #21275

- Fixes #21274

Core/System.cpp

@@ -600,11 +600,16 @@ bool PSP_InitStart(const CoreParameter &coreParam) {
 	Draw::DrawContext *draw = g_CoreParameter.graphicsContext ? g_CoreParameter.graphicsContext->GetDrawContext() : nullptr;
 
 	GPUCore gpuCore = g_CoreParameter.gpuCore;
+
+	// In libretro, the creation order is different, it's ok with a null draw context here.
+	// We do need to rework the whole init process.. ugh.
+#ifndef __LIBRETRO__
 	if (!draw && gpuCore != GPUCORE_SOFTWARE) {
 		ERROR_LOG(Log::Loader, "No drawing context provided.");
 		g_bootState = BootState::Failed;
 		return false;
 	}
+#endif
 
 	g_CoreParameter.errorString.clear();
 

libretro/LibretroVulkanContext.cpp

@@ -124,8 +124,10 @@ void LibretroVulkanContext::ContextReset() {
 
 void LibretroVulkanContext::ContextDestroy() {
    INFO_LOG(Log::G3D, "LibretroVulkanContext::ContextDestroy()");
-   vk->WaitUntilQueueIdle();
-   LibretroHWRenderContext::ContextDestroy();
+   if (vk) {
+      vk->WaitUntilQueueIdle();
+      LibretroHWRenderContext::ContextDestroy();
+   }
 }
 
 void LibretroVulkanContext::CreateDrawContext() {