dnshelper.c: only include ares_setup.h if c-ares is embedded. Patch by Örjan Persson.

http://git.42mm.org/?p=python-gevent;a=blob;f=debian/patches/do-not-include-ares-setup;h=28b1e91eba74da4bae913e99f6348d6c38f468eb;hb=HEAD

gevent/dnshelper.c

 /* Copyright (c) 2011 Denis Bilenko. See LICENSE for details. */
 #include "Python.h"
+#ifdef CARES_EMBED
 #include "ares_setup.h"
+#endif
 
 #ifdef HAVE_NETDB_H
 #include <netdb.h>