4xm decoder uses get_buffer, set CODEC_CAP_DR1

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@19091 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/4xm.c

@@ -845,7 +845,7 @@ AVCodec fourxm_decoder = {
     NULL,
     decode_end,
     decode_frame,
-    /*CODEC_CAP_DR1,*/
+    CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("4X Movie"),
 };