Add long names to many AVCodec declarations.

patch by Stefano Sabatini, stefano.sabatini-lala poste it

Originally committed as revision 13005 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/flashsv.c

@@ -255,4 +255,5 @@ AVCodec flashsv_decoder = {
     flashsv_decode_frame,
     CODEC_CAP_DR1,
     .pix_fmts = (enum PixelFormat[]){PIX_FMT_BGR24, -1},
+    .long_name = "Flash Screen Video",
 };