core: forward declare NMVpnConnection in nm-types.h

Signed-off-by: Thomas Haller <thaller@redhat.com>

src/nm-types.h

@@ -23,6 +23,7 @@
 
 /* core */
 typedef struct _NMActiveConnection   NMActiveConnection;
+typedef struct _NMVpnConnection      NMVpnConnection;
 typedef struct _NMActRequest         NMActRequest;
 typedef struct _NMAuthSubject        NMAuthSubject;
 typedef struct _NMConnectionProvider NMConnectionProvider;

src/vpn-manager/nm-vpn-connection.h

@@ -46,9 +46,9 @@
 #define NM_VPN_CONNECTION_INTERNAL_RETRY_AFTER_FAILURE "internal-retry-after-failure"
 
 
-typedef struct {
+struct _NMVpnConnection {
 	NMActiveConnection parent;
-} NMVpnConnection;
+};
 
 typedef struct {
 	NMActiveConnectionClass parent;