Fixed some issues found by winapi_check.
diff --git a/dlls/iphlpapi/iphlpapi_main.c b/dlls/iphlpapi/iphlpapi_main.c
index 2ef5b31..07a52ee 100644
--- a/dlls/iphlpapi/iphlpapi_main.c
+++ b/dlls/iphlpapi/iphlpapi_main.c
@@ -23,12 +23,15 @@
#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
+# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_NAMESER_H
-#include <arpa/nameser.h>
+# include <arpa/nameser.h>
#endif
-#include <resolv.h>
+#ifdef HAVE_RESOLV_H
+# include <resolv.h>
+#endif
+
#include "winbase.h"
#include "iphlpapi.h"
#include "ifenum.h"