Description:
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Using the function stats_rand_gen_normal() produces always the same number.

For example stats_rand_gen_normal(0,1) will always produce 0.87032747268677

php -r "echo stats_rand_gen_normal(0,1);"
0.87032747268677

Test script:
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<?php

echo stats_rand_gen_normal(0,1);
echo PHP_EOL;
echo stats_rand_gen_normal(0,1);
echo PHP_EOL;
echo stats_rand_gen_normal(0,1);


Expected result:
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A random normal number.

Actual result:
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Always the same normal number for the same arguments used.