nat: Do not use the bssap.h include as it does not exist in this branch.
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index 9fc057d..eed7f3a 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -24,7 +24,6 @@
#include <openbsc/bsc_nat.h>
#include <openbsc/gsm_data.h>
-#include <openbsc/bssap.h>
#include <openbsc/debug.h>
#include <openbsc/ipaccess.h>
@@ -32,6 +31,8 @@
#include <osmocore/talloc.h>
#include <osmocore/gsm0808.h>
+#include <osmocore/protocol/gsm_08_08.h>
+
#include <sccp/sccp.h>
#include <netinet/in.h>