initstate makes out-of-bounds writes

[bhaible]

The initstate function may write into the array passed as argument. POSIX specifies that the third argument is the size of this array: ​https://pubs.opengroup.org/onlinepubs/9699919799/functions/initstate.html "The initstate() function allows a state array, pointed to by the state argument, to be initialized for future use. The size argument, which specifies the size in bytes of the state array, shall be used by initstate() to decide what type of random-number generator to use; the larger the state array, the more random the numbers. Values for the amount of state information are 8, 32, 64, 128, and 256 bytes."

In Haiku r1beta4, the initstate functions also clobbers local variables in the calling function.

How to reproduce (on x86_64):

$ gcc -ggdb -Wall foo.c
$ ./a.out
n_big = 14883589
Abort

[bhaible]

test case

[waddlesplash]

Probably these methods can be replaced with the ones from musl.

[waddlesplash]

Fixed in hrev56906.