array_trunc - reduce number of initialized bytes

       array_trunc is the same as array_truncate with len equal to 0.

       array_trunc - reduce number of initialized bytes

array_allocate(3), array_get(3), array_fail(3), array_truncate(3), array_reset(3)

                                                                                                  array_trunc(3)

#include<libowfat/array.h>

       void array_trunc(array* x);

         array x;
         array_trunc(&x);