lavfi: use designated initializers for AVClass

While here:
    - add missing .version and .category,
    - make .class_name consistent across filters,
    - align declarations.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/libavfilter/af_amix.c b/libavfilter/af_amix.c
index 003a8e8e62..81586981be 100644
--- a/libavfilter/af_amix.c
+++ b/libavfilter/af_amix.c
@@ -185,10 +185,11 @@ static const AVOption options[] = {
 };
 
 static const AVClass amix_class = {
-    .class_name = "amix filter",
+    .class_name = "amix",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
+    .category   = AV_CLASS_CATEGORY_FILTER,
 };