wc: avoid NULL dereference on out-of-memory error

* src/wc.c (main): Diagnose failed argv_iter_init_* failure,
rather than falling through and dereferencing NULL.
Bug introduced by 2008-11-25 commit c2e56e0d,
"wc: read and process --files0-from= input a name at a time,".
* NEWS (Bug fixes): Mention it.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/wc.c b/src/wc.c
index 3afd4deab..ccf4ccfbc 100644
--- a/src/wc.c
+++ b/src/wc.c
@@ -709,6 +709,9 @@ main (int argc, char **argv)
       ai = argv_iter_init_argv (files);
     }
 
+  if (!ai)
+    xalloc_die ();
+
   fstatus = get_input_fstatus (nfiles, files);
   number_width = compute_number_width (nfiles, fstatus);