bug in btowc(0)

[Eric Blake]

On the gnulib list, it was pointed out that cygwin btowc has a bug:

+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+  if (btowc ('\0') != 0)
+    return 1;
+  return 0;
+}

should have status 0, because NUL is an ASCII byte.  Right now, btowc is
mistakenly returning WEOF and this program has status 1.

-- 
Eric Blake   eblake@redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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