use msgb_sctp_ppid() from libosmo-netif, remove local declaration
diff --git a/src/hnbgw_rua.c b/src/hnbgw_rua.c
index cca09ad..3ac3751 100644
--- a/src/hnbgw_rua.c
+++ b/src/hnbgw_rua.c
@@ -21,6 +21,7 @@
 
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/utils.h>
+#include <osmocom/netif/stream.h>
 
 #include <unistd.h>
 #include <errno.h>
@@ -38,7 +39,7 @@
 	if (!msg)
 		return -EINVAL;
 
-	msgb_ppid(msg) = IUH_PPI_RUA;
+	msgb_sctp_ppid(msg) = IUH_PPI_RUA;
 	return osmo_wqueue_enqueue(&ctx->wqueue, msg);
 }