decoder/ffmpeg: suppress warning about unused variable

Only relevant for old ffmpeg versions.

decoder/ffmpeg: suppress warning about unused variable
3477acee · Max Kellermann · 2c4b9981 · 3477acee
Commit 3477acee authored Apr 08, 2013 by Max Kellermann
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FfmpegDecoderPlugin.cxx src/decoder/FfmpegDecoderPlugin.cxx +2 -0

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--- a/src/decoder/FfmpegDecoderPlugin.cxx
+++ b/src/decoder/FfmpegDecoderPlugin.cxx
@@ -308,6 +308,8 @@ ffmpeg_send_packet(struct decoder *decoder, struct input_stream *is,
 		} else if (len >= 0)
 			len = -1;
 #else
+		(void)frame;
+
 		int len = avcodec_decode_audio3(codec_context,
 						aligned_buffer, &audio_size,
 						&packet2);