minor optimizations over sprite path

src/rendering/twn_sprites.c

@@ -152,7 +152,7 @@ void render_sprite_batch(const Primitive2D primitives[],
 
             Vec2 uv0, uv1, uv2, uv3;
 
-            if (!sprite.repeat) {
+            if (!batch.repeat) {
                 const float wr = srcrect.w / dims.w;
                 const float hr = srcrect.h / dims.h;
                 const float xr = srcrect.x / dims.w;