consistent codec name by Stefano Sabatini, stefano.sabatini-lala poste it

Originally committed as revision 13180 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/roqaudioenc.c

@@ -174,5 +174,5 @@ AVCodec roq_dpcm_encoder = {
     roq_dpcm_encode_frame,
     roq_dpcm_encode_close,
     NULL,
-    .long_name = "id RoQ audio",
+    .long_name = "id RoQ DPCM",
 };