Improve memory safety.

Also fixed a case where we didn't reset the GL state correctly 🤷

main.cpp

@@ -259,6 +259,7 @@ int main(int argc, char** argv) {
             if (j2d_render_target->GetDimensions().x <= 1)
                 increasing = true;
         }
+
         std::chrono::high_resolution_clock::time_point start = std::chrono::high_resolution_clock::now();
         window->pollEvents();
         window->refresh();