vlr_auth_fsm: add result no_auth_info_event

Add third outcome of auth_fsm: the no_auth_info_event, which should be
dispatched when auth failed because the HLR has no auth info for this
subscriber, i.e. not because an actual auth challenge failed.

No functional change: Handling no_auth_info_event separately follows in
another patch (to allow fallback to no-auth). Feed the same
_E_AUTH_FAILURE as no_auth_info_event to still behave unchanged.

Related: OS#4830
Change-Id: I5103b1f2727f1729a5517ae359df813d50436ed3
diff --git a/src/libvlr/vlr_lu_fsm.c b/src/libvlr/vlr_lu_fsm.c
index 0f167a4..a65421c 100644
--- a/src/libvlr/vlr_lu_fsm.c
+++ b/src/libvlr/vlr_lu_fsm.c
@@ -914,6 +914,7 @@
 						fi,
 						VLR_ULA_E_AUTH_SUCCESS,
 						VLR_ULA_E_AUTH_FAILURE,
+						VLR_ULA_E_AUTH_FAILURE,
 						lfp->is_r99,
 						lfp->is_utran);
 	} else {