imc: jump over printing error log messages when list commands are ok

- reported by GH #2481

src/modules/imc/imc_cmd.c

@@ -942,13 +942,15 @@ int imc_handle_members(struct sip_msg* msg, imc_cmd_t *cmd,
 	struct imc_uri room;
 
 	memset(&room, '\0', sizeof(room));
-	if (build_imc_uri(&room, cmd->param[0].s ? cmd->param[0] : dst->parsed.user, &dst->parsed))
-		goto error;
+	if (build_imc_uri(&room, cmd->param[0].s ? cmd->param[0] : dst->parsed.user,
+				&dst->parsed)) {
+		goto done;
+	}
 
 	rm = imc_get_room(&room.parsed.user, &room.parsed.host);
 	if (rm == NULL || (rm->flags & IMC_ROOM_DELETED)) {
 		LM_ERR("Room [%.*s] does not exist!\n",	STR_FMT(&room.uri));
-		goto error;
+		goto done;
 	}
 
 	/* verify if the user is a member of the room */
@@ -956,7 +958,7 @@ int imc_handle_members(struct sip_msg* msg, imc_cmd_t *cmd,
 	if (member == NULL) {
 		LM_ERR("User [%.*s] is not member of room [%.*s]!\n",
 				STR_FMT(&src->uri), STR_FMT(&rm->uri));
-		goto error;
+		goto done;
 	}
 
 	p = imc_body_buf;
@@ -1004,13 +1006,16 @@ int imc_handle_members(struct sip_msg* msg, imc_cmd_t *cmd,
 	body.len = p - body.s;
 
 	LM_DBG("members = '%.*s'\n", STR_FMT(&body));
-	LM_ERR("Message-ID: '%.*s'\n", STR_FMT(get_callid(msg)));
+	LM_DBG("Message-ID: '%.*s'\n", STR_FMT(get_callid(msg)));
 	imc_send_message(&rm->uri, &member->uri, build_headers(msg), &body);
 
 	rv = 0;
+	goto done;
+
 overrun:
 	LM_ERR("Buffer too small for member list message\n");
-error:
+
+done:
 	if (room.uri.s != NULL) pkg_free(room.uri.s);
 	if (rm != NULL) imc_release_room(rm);
 	return rv;
@@ -1065,7 +1070,8 @@ int imc_handle_rooms(struct sip_msg* msg, imc_cmd_t *cmd,
 	LM_DBG("rooms = '%.*s'\n", STR_FMT(&body));
 	imc_send_message(&dst->uri, &src->uri, build_headers(msg), &body);
 
-	rv = 0;
+	return 0;
+
 error:
 	LM_ERR("Buffer too small for member list message\n");
 	return rv;