Use C formatting macros working for 32/64 bit

Author: bobot

tests/array/lib.c

@@ -26,7 +26,7 @@ void f2(intptr_t *a, size_t len)
 {
     for (size_t i = 0; i < len; i++)
     {
-        printf("c:%li\n", a[i]);
+        printf("c:%" PRIiPTR "\n", a[i]);
         fflush(stdout);
         a[i] += 1;
     }