Queue iter over elements instead of headers

gamestate.c

@@ -1719,7 +1719,7 @@ SerMaybeFailure ser_client_to_server(SerState *ser, ClientToServer *msg)
   {
     size_t to_skip = queue_num_elements(msg->input_data) - num;
     size_t i = 0;
-    QUEUE_ITER(msg->input_data, cur_header)
+    QUEUE_ITER(msg->input_data, InputFrame, cur)
     {
       if (i < to_skip)
       {
@@ -1727,7 +1727,6 @@ SerMaybeFailure ser_client_to_server(SerState *ser, ClientToServer *msg)
       }
       else
       {
-        InputFrame *cur = (InputFrame *)cur_header->data;
         SER_MAYBE_RETURN(ser_inputframe(ser, cur));
       }
     }

main.c

@@ -1427,9 +1427,8 @@ static void draw_dots(cpVect camera_pos, double gap)
 void apply_this_tick_of_input_to_player(uint64_t tick_to_search_for)
 {
   InputFrame *to_apply = NULL;
-  QUEUE_ITER(&input_queue, cur_header)
+  QUEUE_ITER(&input_queue, InputFrame, cur)
   {
-    InputFrame *cur = (InputFrame *)cur_header->data;
     if (cur->tick == tick(&gs))
     {
       to_apply = cur;

queue.h

@@ -25,7 +25,7 @@ typedef struct Queue
 #define QUEUE_SIZE_FOR_ELEMENTS(element_size, max_elements) ((sizeof(QueueElementHeader) + element_size) * max_elements)
 
 // oldest to newest
-#define QUEUE_ITER(q_ptr, cur_header) for (QueueElementHeader *cur_header = (q_ptr)->next; cur_header != NULL; cur_header = cur_header->next)
+#define QUEUE_ITER(q_ptr, type, cur) for (QueueElementHeader *cur_header = (q_ptr)->next; cur_header != NULL; cur_header = cur_header->next) for(type *cur = (type*)cur_header->data; cur != NULL; cur = NULL)
 void queue_init(Queue *q, size_t element_size, char *data, size_t data_length);
 void queue_clear(Queue *q);
 void *queue_push_element(Queue *q);

server.c

@@ -312,9 +312,8 @@ void server(void *info_raw)
           CONNECTED_PEERS(enet_host, cur)
           {
             int this_player_index = (int)(int64_t)cur->data;
-            QUEUE_ITER(&player_input_queues[this_player_index], cur_header)
+            QUEUE_ITER(&player_input_queues[this_player_index], InputFrame, cur)
             {
-              InputFrame *cur = (InputFrame *)cur_header->data;
               if (cur->tick == tick(&gs))
               {
                 gs.players[this_player_index].input = *cur;