Remove memory leak in SimpleOpenGL3 example code

examples/OpenGLWindow/SimpleOpenGL3App.cpp

@@ -650,9 +650,13 @@ void SimpleOpenGL3App::setBackgroundColor(float red, float green, float blue)
 
 SimpleOpenGL3App::~SimpleOpenGL3App()
 {
-	delete m_primRenderer ;
 	
+	delete m_instancingRenderer;
+	delete m_primRenderer ;
+	sth_delete(m_data->m_fontStash);
+	delete m_data->m_renderCallbacks;
 	m_window->closeWindow();
+	TwDeleteDefaultFonts();
 	delete m_window;
 	delete m_data ;
 }

examples/SimpleOpenGL3/main.cpp

@@ -1,3 +1,4 @@
+
 #include "OpenGLWindow/SimpleOpenGL3App.h"
 #include "Bullet3Common/b3Quaternion.h"
 #include "Bullet3Common/b3CommandLineArgs.h"
@@ -150,6 +151,9 @@ int main(int argc, char* argv[])
 	} while (!app->m_window->requestedExit());
 
 
+	
 	delete app;
+
+	delete[] image;
 	return 0;
 }