random_seed: simplify
Originally committed as revision 23932 to svn://svn.ffmpeg.org/ffmpeg/trunk
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				@ -40,12 +40,10 @@ static int read_random(uint32_t *dst, const char *file)
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uint32_t av_get_random_seed(void)
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{
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    uint32_t seed;
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    int err;
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    err = read_random(&seed, "/dev/urandom");
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    if (err != sizeof(seed))
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        err = read_random(&seed, "/dev/random");
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    if (err == sizeof(seed))
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    if (read_random(&seed, "/dev/urandom") == sizeof(seed))
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        return seed;
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    if (read_random(&seed, "/dev/random")  == sizeof(seed))
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        return seed;
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#ifdef AV_READ_TIME
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