Add long names to some AVCodec declarations.

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

Originally committed as revision 13022 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/sunrast.c

@@ -191,5 +191,6 @@ AVCodec sunrast_decoder = {
     sunrast_end,
     sunrast_decode_frame,
     0,
-    NULL
+    NULL,
+    .long_name = "Sun Rasterfile image",
 };