bsc: Fix compiler warning about undeclare functions
Addresses:
osmo_bsc_sccp.c:280:2: warning: implicit declaration of function ‘gsm0480_send_ussdNotify’ [-Wimplicit-function-declaration]
osmo_bsc_sccp.c:281:2: warning: implicit declaration of function ‘gsm0480_send_releaseComplete’ [-Wimplicit-function-declaration]
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
index ad554e8..87f415e 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_sccp.c
@@ -23,6 +23,7 @@
#include <openbsc/osmo_bsc.h>
#include <openbsc/osmo_bsc_grace.h>
#include <openbsc/osmo_msc_data.h>
+#include <openbsc/gsm_04_80.h>
#include <openbsc/debug.h>
#include <openbsc/ipaccess.h>
#include <openbsc/signal.h>