fix ifdef for arc4random
r1814239 added:
AC_CHECK_FUNCS(arc4random_buf)
Which only defines HAVE_ARC4RANDOM_BUF
@@ -224,7 +224,7 @@ APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char *buf,
length -= rc;
} while (length > 0);
-#elif defined(HAVE_ARC4RANDOM)
+#elif defined(HAVE_ARC4RANDOM_BUF)
arc4random_buf(buf, length);
