codec_filter_run: prepare for CSD

Related: OS#4394
Change-Id: I18b396193ad25a3905cc8c1853c9680dab0a2d44
diff --git a/include/osmocom/msc/transaction_cc.h b/include/osmocom/msc/transaction_cc.h
index 1f2f8c1..32e61b6 100644
--- a/include/osmocom/msc/transaction_cc.h
+++ b/include/osmocom/msc/transaction_cc.h
@@ -33,4 +33,5 @@
 void trans_cc_filter_init(struct gsm_trans *trans);
 void trans_cc_filter_set_ran(struct gsm_trans *trans, enum osmo_rat_type ran_type);
 void trans_cc_filter_set_bss(struct gsm_trans *trans, struct msc_a *msc_a);
+void trans_cc_filter_run(struct gsm_trans *trans);
 void trans_cc_filter_set_ms_from_bc(struct gsm_trans *trans, const struct gsm_mncc_bearer_cap *bcap);