transaction: fix description of trans_assign_trans_id()

Change-Id: I80238d89e95b6fd791961c48de80aac69ff5b0e9
diff --git a/src/libmsc/transaction.c b/src/libmsc/transaction.c
index 23880aa..66126e6 100644
--- a/src/libmsc/transaction.c
+++ b/src/libmsc/transaction.c
@@ -182,8 +182,8 @@
  * in the given protocol using TI flag = 0 (allocated by us).
  * See GSM 04.07, section 11.2.3.1.3 "Transaction identifier".
  * \param[in] net GSM network
- * \param[in] subscr Subscriber for which to find ID
- * \param[in] protocol Protocol for whihc to find ID
+ * \param[in] subscr Subscriber for which to assign a new TID
+ * \param[in] protocol Protocol of to be assigned TID
  */
 int trans_assign_trans_id(const struct gsm_network *net, const struct vlr_subscr *vsub,
 			  uint8_t protocol)