Fix xine metronom compile

src/engine/xineengine.cpp

@@ -15,12 +15,21 @@
 
 #include "config.h"
 
+#ifndef XINE_ENGINE_INTERNAL
+#  define XINE_ENGINE_INTERNAL
+#endif
+
+#ifndef METRONOM_INTERNAL
+#  define METRONOM_INTERNAL
+#endif
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 #include <xine.h>
+#include <xine/metronom.h>
 
 #include <memory>
 #include <cstdlib>

src/engine/xineengine.h

@@ -18,6 +18,10 @@
 
 #include "config.h"
 
+#ifndef XINE_ENGINE_INTERNAL
+#  define XINE_ENGINE_INTERNAL
+#endif
+
 #include <memory>
 #include <stdbool.h>
 #include <stdint.h>

src/engine/xinescope.c

@@ -6,7 +6,9 @@
 */
 
 /* need access to port_ticket */
-#define XINE_ENGINE_INTERNAL
+#ifndef XINE_ENGINE_INTERNAL
+#  define XINE_ENGINE_INTERNAL
+#endif
 
 #include "config.h"
 

src/engine/xinescope.h

@@ -8,7 +8,9 @@
 #define XINESCOPE_H
 
 /* need access to some stuff for scope time stamping */
-#define METRONOM_INTERNAL
+#ifndef METRONOM_INTERNAL
+#  define METRONOM_INTERNAL
+#endif
 
 #include "config.h"