Free server id pools directly.

When closing the game, we flush the command queue but after we are pushing the freeing calls of the id pool to the
command queue and they are never being run. Now we free them directly.

(cherry picked from commit 7aa4622222d3cc88b2d6c2e5552bc372272c3123)

servers/server_wrap_mt_common.h

@@ -50,7 +50,7 @@
 	}                                                                                      \
 	void m_type##_free_cached_ids() {                                                      \
 		while (m_type##_id_pool.size()) {                                                  \
-			free(m_type##_id_pool.front()->get());                                         \
+			server_name->free(m_type##_id_pool.front()->get());                            \
 			m_type##_id_pool.pop_front();                                                  \
 		}                                                                                  \
 	}                                                                                      \