HNBAP: use GSM23003_IMSI_MAX_DIGITS instead of magic number

Change-Id: I2ea0a6a93194da2efb768cd4245767301411eb41
---
M src/osmo-hnbgw/hnbgw_hnbap.c
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/osmo-hnbgw/hnbgw_hnbap.c b/src/osmo-hnbgw/hnbgw_hnbap.c
index 6d3c8e0..fc06462 100644
--- a/src/osmo-hnbgw/hnbgw_hnbap.c
+++ b/src/osmo-hnbgw/hnbgw_hnbap.c
@@ -22,6 +22,7 @@
 #include <osmocom/core/utils.h>
 #include <osmocom/core/socket.h>
 #include <osmocom/gsm/gsm48.h>
+#include <osmocom/gsm/protocol/gsm_23_003.h>
 #include <osmocom/netif/stream.h>
 
 #include <unistd.h>
@@ -564,7 +565,7 @@
 	HNBAP_Cause_t cause;
 	struct ue_context *ue;
 	struct ue_context *ue_allocated = NULL;
-	char imsi[16];
+	char imsi[GSM23003_IMSI_MAX_DIGITS+1];
 	int rc;
 
 	rc = hnbap_decode_ueregisterrequesties(&ies, in);

