avfilter/internal: Don't include video.h

internal.h does not depend on video.h (and should not depend on it)
and therefore should not include video.h at all; instead all users
of video.h should include it directly.

Doing so also avoids unnecessary video.h inclusions in files that
don't need it, like most audio filters.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavfilter/yadif_common.c

@@ -22,6 +22,7 @@
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "internal.h"
+#include "video.h"
 #include "yadif.h"
 
 static int return_frame(AVFilterContext *ctx, int is_second)