Brown bag commit to fix 957e8d (arc4random_buf() support)

- typo in #ifdef check
- also need to add AC_CHECK_FUNCS([arc4random_buf])

Reported-by Eric Engestrom. Thanks

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>

configure.ac

@@ -226,6 +226,7 @@ AC_REPLACE_FUNCS([reallocarray strcasecmp strcasestr strlcat strlcpy strndup\
 AM_CONDITIONAL(POLL, [test "x$ac_cv_func_poll" = "xyes"])
 
 AC_CHECK_LIB([bsd], [arc4random_buf])
+AC_CHECK_FUNCS([arc4random_buf])
 
 AC_CHECK_DECLS([program_invocation_short_name], [], [], [[#include <errno.h>]])
 

os/auth.c

@@ -305,7 +305,7 @@ GenerateAuthorization(unsigned name_length,
 void
 GenerateRandomData(int len, char *buf)
 {
-#ifdef HAVE_ARC4RANDOMBUF
+#ifdef HAVE_ARC4RANDOM_BUF
     arc4random_buf(buf, len);
 #else
     int fd;