Fix maybe uninitialized warnings in random.c

Fixes the following compiler warnings:

    random.c: In function `random_init`:
    random.c:416:38: warning: `rng` may be used uninitialized in this function [-Wmaybe-uninitialized]
      416 |     unsigned int major = rng->version.major;
          |                          ~~~~~~~~~~~~^~~~~~
    random.c: In function `random_bytes`:
    random.c:1284:8: warning: `rng` may be used uninitialized in this function [-Wmaybe-uninitialized]
    1284 |     rng->get_bytes(rnd, ptr, n);
         |     ~~~^~~~~~~~~~~
    random.c:1299:34: note: `rng` was declared here
    1299 |     const rb_random_interface_t *rng;
         |                                  ^~~
    random.c: In function `rand_random_number`:
    random.c:1606:12: warning: `rng` may be used uninitialized in this function [-Wmaybe-uninitialized]
    1606 |     return rand_range(obj, rng, rnd, vmax);
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    random.c:1624:34: note: `rng` was declared here
    1624 |     const rb_random_interface_t *rng;
          |                                  ^~~
    random.c: In function `random_rand`:
    random.c:1120:15: warning: `rng` may be used uninitialized in this function [-Wmaybe-uninitialized]
    1120 |     return rng->get_int32(rnd);
         |            ~~~^~~~~~~~~~~
    random.c:1573:34: note: `rng` was declared here
    1573 |     const rb_random_interface_t *rng;
         |                                  ^~~

0 files changed, 0 insertions, 0 deletions