snake null

cv9/snake.c

@@ -13,6 +13,9 @@ struct snake* add_snake(struct snake* snake,int x,int y){
 }
 
 struct snake* remove_snake(struct snake* snake){
+    if (snake == NULL) {
+        return NULL; 
+    }
     
     struct snake* nova_hlavicka = snake->next;
     free(snake);