build: fix a build warning on 32 bit systems in shuf.c

Prompted by the continuous integration build failure at:
http://hydra.nixos.org/build/5508873

* src/shuf.c (write_random_numbers): Convert to an int type
that matches the prinft format spec.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shuf.c b/src/shuf.c
index a8c1d8530..f7fc9369c 100644
--- a/src/shuf.c
+++ b/src/shuf.c
@@ -350,7 +350,7 @@ write_random_numbers (struct randint_source *s, size_t count,
 
   for (i = 0; i < count; i++)
     {
-      randint j = lo_input + randint_choose (s, range);
+      unsigned long int j = lo_input + randint_choose (s, range);
       if (printf ("%lu%c", j, eolbyte) < 0)
         return -1;
     }