fix: empty frame in redis

It's caused an infinit loop. Now some point in (0, 0) with no light ar
added instead of added empty frame.

src/main.rs

@@ -153,6 +153,7 @@ fn get_next_frame(
         line = transformer.apply(&line, world_state);
     }
 
+
     info!("Draw Black -> {}", world_state.draw_black);
     info!("Draw Grid -> {}", world_state.draw_grid);
 

src/transformer/replicate.rs

@@ -1,4 +1,4 @@
-use crate::point::Point;
+use crate::point::{Point, Color};
 use crate::transformer::Transformers;
 use crate::worldstate::WorldState;
 
@@ -16,12 +16,17 @@ pub enum Replicate {
 impl Transformers for Replicate {
     fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
         let mut point_list2 = vec![];
+
         match self {
             Replicate::Until(n) => {
                 while point_list2.len() < *n {
+                    if point_list.len() == 0 { // to prevent infinit loop in case of empty frame
+                        point_list2.append(&mut vec![Point{x:0., y:0., color: Color{r:0, g:0, b:0}}; *n].to_vec());
+                    } else {
                         point_list2.append(&mut point_list.to_vec());
                     }
                 }
+            }
             Replicate::Times(n) => {
                 for _ in 0..*n {
                     point_list2.append(&mut point_list.to_vec());