mgcp-client: Create alloc() and free() internal APIs for mgcp_client_pool_member

Related: SYS#5987
Change-Id: Ibd2bf976885c777fe944652af6fe6eb0f1820468
diff --git a/include/osmocom/mgcp_client/mgcp_client_pool_internal.h b/include/osmocom/mgcp_client/mgcp_client_pool_internal.h
index 148a5cf..582090c 100644
--- a/include/osmocom/mgcp_client/mgcp_client_pool_internal.h
+++ b/include/osmocom/mgcp_client/mgcp_client_pool_internal.h
@@ -45,4 +45,6 @@
 
 struct mgcp_client_pool_member *mgcp_client_pool_find_member_by_nr(struct mgcp_client_pool *pool, unsigned int nr);
 
+struct mgcp_client_pool_member *mgcp_client_pool_member_alloc(struct mgcp_client_pool *pool, unsigned int nr);
+void mgcp_client_pool_member_free(struct mgcp_client_pool_member *pool_member);
 const char *mgcp_client_pool_member_name(const struct mgcp_client_pool_member *pool_member);