SDLPP: Save texture before rendering

In some cases texture might be changed after render() has been called
but before renderer presented the render, causing errors.

sdlpp/sdlpp_renderobject.cpp

@@ -119,4 +119,7 @@ void RenderObject::copyTo(std::shared_ptr<RenderObject> other) {
     }
     other->colidedWith.clear();
 }
+void RenderObject::saveCurTexture() {
+    cur_texture = texture;
+}
 } // namespace SDLPP

sdlpp/sdlpp_renderobject.hpp

@@ -78,11 +78,13 @@ public:
     bool isStatic();
     void setStatic( bool stat = true );
     std::shared_ptr< Renderer > getRenderer() const;
+    void saveCurTexture();
 
 protected:
     virtual void copyTo( std::shared_ptr< RenderObject > other );
     std::vector< std::shared_ptr< CollisionPolygon > > collisions;
     std::shared_ptr< Texture > texture;
+    std::shared_ptr< Texture > cur_texture;
     std::shared_ptr< Renderer > renderer;
     std::shared_ptr< CollisionPolygon > polygon;
     double movementSpeed = 0;

sdlpp/sdlpp_scene.cpp

@@ -121,6 +121,7 @@ void Scene::renderScene( bool clear_renderer ) {
         SDL_RenderCopy( renderer->getRendererPtr(), background->getTexturePtr(),
                         NULL, NULL );
     for ( const auto &x : render_objects ) {
+        x->saveCurTexture();
         x->render();
     }
 }

sdlpp/sdlpp_texture.cpp

@@ -55,6 +55,7 @@ Texture::Texture( std::shared_ptr< Renderer > &renderer, Font &font,
     setTextureFromSurface( renderer, surface );
 }
 Texture::~Texture() {
+    if ( texture != nullptr )
         SDL_DestroyTexture( texture );
 }
 SDL_Texture *Texture::getTexturePtr() {