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user_ifdhandler: Fix missing check of osmo_fd_register return val

Fixes: CID#307514: Unchecked return value (CHECKED_RETURN)
Change-Id: I99d7254b6cc3bf5ead800dafabc77a965857911c
---
M src/client/user_ifdhandler.c
1 file changed, 12 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-remsim refs/changes/78/33778/1

diff --git a/src/client/user_ifdhandler.c b/src/client/user_ifdhandler.c
index 5e7fb7a..c6a9392 100644
--- a/src/client/user_ifdhandler.c
+++ b/src/client/user_ifdhandler.c
@@ -396,7 +396,8 @@
 
 	INIT_LLIST_HEAD(&ct->it_msgq);
 	osmo_fd_setup(&ct->it_ofd, cfg->it_sock_fd, OSMO_FD_READ, &it_sock_fd_cb, ct, 0);
-	osmo_fd_register(&ct->it_ofd);
+	rc = osmo_fd_register(&ct->it_ofd);
+	OSMO_ASSERT(rc == 0);
 
 	/* ensure we get properly cleaned up if cancelled */
 	pthread_cleanup_push(client_pthread_cleanup, ct);

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