Fix missed _POLL_EMUL_H_ and HAVE_POLL combo

Utilities/cmcurl/select.c

@@ -220,7 +220,7 @@ int Curl_select(curl_socket_t readfd, curl_socket_t writefd, int timeout_ms)
 int Curl_poll(struct pollfd ufds[], unsigned int nfds, int timeout_ms)
 {
   int r;
-#ifndef _POLL_EMUL_H_
+#if defined(HAVE_POLL) && !defined(_POLL_EMUL_H_)
   do {
     r = poll(ufds, nfds, timeout_ms);
   } while((r == -1) && (errno == EINTR));