AVERROR(ENOMEM) must be used instead, and there are no occurrences of
AVERROR_ENOMEM in the FFmpeg basecode so it can be safely dropped.
Originally committed as revision 22514 to svn://svn.ffmpeg.org/ffmpeg/trunk
#if LIBAVUTIL_VERSION_MAJOR < 51
#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
#define AVERROR_IO AVERROR(EIO) /**< I/O error */
+#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
#endif
#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */
#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
-#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */
#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */