avcodec/motionpixels: Avoid av_unused

Easily possible now that -Wdeclaration-after-statement is gone.

Signed-off-by: Andreas Rheinhardt <[email protected]>

Author: mkver

libavcodec/motionpixels.c

@@ -70,7 +70,6 @@ static av_cold int mp_decode_end(AVCodecContext *avctx)
 
 static av_cold int mp_decode_init(AVCodecContext *avctx)
 {
-    av_unused static AVOnce init_static_once = AV_ONCE_INIT;
     MotionPixelsContext *mp = avctx->priv_data;
     int w4 = (avctx->width  + 3) & ~3;
     int h4 = (avctx->height + 3) & ~3;
@@ -95,6 +94,7 @@ static av_cold int mp_decode_init(AVCodecContext *avctx)
         return AVERROR(ENOMEM);
 
 #if !CONFIG_HARDCODED_TABLES
+    static AVOnce init_static_once = AV_ONCE_INIT;
     ff_thread_once(&init_static_once, motionpixels_tableinit);
 #endif