oggdemux: fix werror build on macos

oggdemux: fix werror build on macos

../ext/ogg/gstoggdemux.c:1071:7: error: format specifies type 'long' but the argument has type 'ogg_int64_t' (aka 'long long') [-Werror,-Wformat]
      packet->granulepos);
      ^~~~~~~~~~~~~~~~~~~
/Library/Frameworks/GStreamer.framework/Versions/1.0/include/gstreamer-1.0/gst/gstinfo.h:1062:96: note: expanded from macro 'GST_DEBUG_OBJECT'
#define GST_DEBUG_OBJECT(obj,...)       GST_CAT_LEVEL_LOG (GST_CAT_DEFAULT, GST_LEVEL_DEBUG,   obj,  __VA_ARGS__)
                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
/Library/Frameworks/GStreamer.framework/Versions/1.0/include/gstreamer-1.0/gst/gstinfo.h:646:31: note: expanded from macro 'GST_CAT_LEVEL_LOG'
        (GObject *) (object), __VA_ARGS__);                             \
                              ^~~~~~~~~~~
../ext/ogg/gstoggdemux.c:1312:15: error: format specifies type 'long' but the argument has type 'ogg_int64_t' (aka 'long long') [-Werror,-Wformat]
              packet.granulepos);
              ^~~~~~~~~~~~~~~~~~
/Library/Frameworks/GStreamer.framework/Versions/1.0/include/gstreamer-1.0/gst/gstinfo.h:1060:98: note: expanded from macro 'GST_WARNING_OBJECT'
#define GST_WARNING_OBJECT(obj,...)     GST_CAT_LEVEL_LOG (GST_CAT_DEFAULT, GST_LEVEL_WARNING, obj,  __VA_ARGS__)
                                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
/Library/Frameworks/GStreamer.framework/Versions/1.0/include/gstreamer-1.0/gst/gstinfo.h:646:31: note: expanded from macro 'GST_CAT_LEVEL_LOG'
        (GObject *) (object), __VA_ARGS__);                             \
                              ^~~~~~~~~~~