SDL buildfix

SDL/SDLGLGraphicsContext.cpp

@@ -439,13 +439,6 @@ int SDLGLGraphicsContext::Init(SDL_Window *&window, int x, int y, int w, int h,
 	return 0;
 }
 
-void SDLGLGraphicsContext::SwapInterval(int interval) {
-	renderManager_->SwapInterval(interval);
-}
-
-void SDLGLGraphicsContext::Shutdown() {
-}
-
 void SDLGLGraphicsContext::ShutdownFromRenderThread() {
 	delete draw_;
 	draw_ = nullptr;

SDL/SDLGLGraphicsContext.h

@@ -16,7 +16,7 @@ public:
 	// Returns 0 on success.
 	int Init(SDL_Window *&window, int x, int y, int w, int h, int mode, std::string *error_message);
 
-	void Shutdown() override;
+	void Shutdown() override {}
 	void ShutdownFromRenderThread() override;
 
 	void Resize() override {}