Ensure the first random number is non-zero when fuzzing
In fuzzing mode, isc_random
uses a fixed seed for reproducibility.
The particular seed chosen happened to produce zero as its first
number, however commit bd251de0 introduced an initialization check in
random_test
that required it to be non-zero. This change adjusts the
seed to avoid spurious test failures.
Also, remove the temporary variable that was used for initialization because it did not match the type of the thread-local seed array.