hnbgw_hnbap: fix missing return in rx [un]successful outcome

Fixes: CID#57732 CID#57733
Change-Id: Iddf76d23c2c7d5824e82708f7da013c88411e832
diff --git a/src/hnbgw_hnbap.c b/src/hnbgw_hnbap.c
index 058a42a..fab520d 100644
--- a/src/hnbgw_hnbap.c
+++ b/src/hnbgw_hnbap.c
@@ -522,12 +522,14 @@
 
 static int hnbgw_rx_successful_outcome_msg(struct hnb_context *hnb, SuccessfulOutcome_t *msg)
 {
-
+	/* We don't care much about HNBAP */
+	return 0;
 }
 
 static int hnbgw_rx_unsuccessful_outcome_msg(struct hnb_context *hnb, UnsuccessfulOutcome_t *msg)
 {
-
+	/* We don't care much about HNBAP */
+	return 0;
 }