lavf: use designated initialisers for all (de)muxers.

It's more readable and less prone to breakage.

libavformat/r3d.c

@@ -384,12 +384,12 @@ static int r3d_close(AVFormatContext *s)
 }
 
 AVInputFormat ff_r3d_demuxer = {
-    "r3d",
-    NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
-    sizeof(R3DContext),
-    r3d_probe,
-    r3d_read_header,
-    r3d_read_packet,
-    r3d_close,
-    r3d_seek,
+    .name           = "r3d",
+    .long_name      = NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
+    .priv_data_size = sizeof(R3DContext),
+    .read_probe     = r3d_probe,
+    .read_header    = r3d_read_header,
+    .read_packet    = r3d_read_packet,
+    .read_close     = r3d_close,
+    .read_seek      = r3d_seek,
 };