The random number generator internal state may be saved to/restored from
an array of integers. Clean up calculation of needed number of elements
to avoid redefiniton of auxiliary macro SZ.
libgfortran/ChangeLog:
* intrinsics/random.c (SZ_IN_INT_4): Define size of state in int32_t.
(SZ_IN_INT_8): Define size of state in int64_t.
(SZ): Remove.
(random_seed_i4): Use size SZ_IN_INT_4 instead of SZ.
(random_seed_i8): Use size SZ_IN_INT_8 instead of SZ.
