add verbose reporting of RR STATUS cause

diff --git a/include/openbsc/gsm_04_08.h b/include/openbsc/gsm_04_08.h
index 6f9bd76..8d00612 100644
--- a/include/openbsc/gsm_04_08.h
+++ b/include/openbsc/gsm_04_08.h
@@ -461,7 +461,7 @@
 	GSM48_RR_CAUSE_HNDOVER_IMP	= 0x06,
 	GSM48_RR_CAUSE_CHAN_MODE_UNACCT	= 0x07,
 	GSM48_RR_CAUSE_FREQ_NOT_IMPL	= 0x08,
-	GSM48_RR_CAUSE_CALL_ClEARED	= 0x41,
+	GSM48_RR_CAUSE_CALL_CLEARED	= 0x41,
 	GSM48_RR_CAUSE_SEMANT_INCORR	= 0x5f,
 	GSM48_RR_CAUSE_INVALID_MAND_INF = 0x60,
 	GSM48_RR_CAUSE_MSG_TYPE_N	= 0x61,