Fix further memory leaks

SDL/SDLMain.cpp

@@ -913,5 +913,6 @@ int main(int argc, char *argv[]) {
 #endif
 
 	glslang::FinalizeProcess();
+	ILOG("Leaving main");
 	return 0;
 }

ext/native/thin3d/GLRenderManager.cpp

@@ -56,6 +56,9 @@ GLRenderManager::~GLRenderManager() {
 	for (int i = 0; i < MAX_INFLIGHT_FRAMES; i++) {
 		_assert_(frameData_[i].deleter.IsEmpty());
 	}
+	// Was anything deleted during shutdown?
+	deleter_.Perform();
+	// _assert_(deleter_.IsEmpty());
 
 	if (!useThread_) {
 		// The main thread is also the render thread.

ext/native/thin3d/thin3d_gl.cpp

@@ -297,6 +297,7 @@ public:
 	OpenGLPipeline(GLRenderManager *render) : render_(render) {
 	}
 	~OpenGLPipeline() {
+		ILOG("OpenGLPipeline released");
 		for (auto &iter : shaders) {
 			iter->Release();
 		}