Hid timer function parameters in a macro (#3311)

src/map/battleground.cpp

@@ -261,8 +261,7 @@ int bg_send_xy_timer_sub(DBKey key, DBData *data, va_list ap)
 	return 0;
 }
 
-int bg_send_xy_timer(int tid, unsigned int tick, int id, intptr_t data)
-{
+TIMER_FUNC(bg_send_xy_timer){
 	bg_team_db->foreach(bg_team_db, bg_send_xy_timer_sub, tick);
 
 	return 0;