Fix memleak in theora decoder due to missing theora_comment_/theora_info_clear on uninit

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@21515 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpcodecs/vd_theora.c

@@ -127,6 +127,8 @@ static void uninit(sh_video_t *sh)
 
    if (context)
    {
+      theora_info_clear(&context->inf);
+      theora_comment_clear(&context->cc);
       theora_clear (&context->st);
       free (context);
    }