IPSEC: header exports

Change-Id: I7d48a4e236c6e7b11b0c9750a30fb68e829d64a5
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ipsec/ipsec_input.c b/src/vnet/ipsec/ipsec_input.c
index 193b03f..0070e33 100644
--- a/src/vnet/ipsec/ipsec_input.c
+++ b/src/vnet/ipsec/ipsec_input.c
@@ -23,6 +23,7 @@
 #include <vnet/ipsec/ipsec.h>
 #include <vnet/ipsec/esp.h>
 #include <vnet/ipsec/ah.h>
+#include <vnet/ipsec/ipsec_io.h>
 
 #define foreach_ipsec_input_error               \
 _(RX_PKTS, "IPSEC pkts received")		\