Fix type of default value for v210 decoder option -custom_stride.

Reviewed-by: Paul B Mahol

libavcodec/v210dec.c

@@ -172,7 +172,7 @@ static av_cold int decode_close(AVCodecContext *avctx)
 #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
 static const AVOption v210dec_options[] = {
     {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT,
-     {.dbl = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
+     {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
     {NULL}
 };