avformat/matroskadec: Fix number suffixes

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit fc3cdb00)

Conflicts:

	libavformat/matroskadec.c

libavformat/matroskadec.c

@@ -1883,7 +1883,7 @@ static int matroska_read_header(AVFormatContext *s)
                 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
                           1000000000, track->default_duration, 30000);
 #if FF_API_R_FRAME_RATE
-                if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000L)
+                if (st->avg_frame_rate.num < st->avg_frame_rate.den * 1000LL)
                     st->r_frame_rate = st->avg_frame_rate;
 #endif
             }