lavc: Move the libtwolame encoder registration to the list for external libraries

This makes sure the default behaviour of using the internal encoder
stays the same regardless if libtwolame is enabled or not (as for
any external library).

This fixes fate-lavf-mpg if libav is built with libtwolame enabled.

CC: libav-stable@libav.org
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavcodec/allcodecs.c

@@ -240,7 +240,6 @@ void avcodec_register_all(void)
     REGISTER_DECODER(SVQ3,              svq3);
     REGISTER_ENCDEC (TARGA,             targa);
     REGISTER_DECODER(THEORA,            theora);
-    REGISTER_ENCODER(LIBTWOLAME,        libtwolame);
     REGISTER_DECODER(THP,               thp);
     REGISTER_DECODER(TIERTEXSEQVIDEO,   tiertexseqvideo);
     REGISTER_ENCDEC (TIFF,              tiff);
@@ -448,6 +447,7 @@ void avcodec_register_all(void)
     REGISTER_ENCDEC (LIBSCHROEDINGER,   libschroedinger);
     REGISTER_ENCDEC (LIBSPEEX,          libspeex);
     REGISTER_ENCODER(LIBTHEORA,         libtheora);
+    REGISTER_ENCODER(LIBTWOLAME,        libtwolame);
     REGISTER_ENCODER(LIBVO_AACENC,      libvo_aacenc);
     REGISTER_ENCODER(LIBVO_AMRWBENC,    libvo_amrwbenc);
     REGISTER_ENCODER(LIBVORBIS,         libvorbis);