Fix broken build on Solaris.

This commit was SVN r18719.

opal/mca/base/mca_base_component_find.c

@@ -10,6 +10,7 @@
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
  * Copyright (c) 2008      Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2008      Sun Microsystems, Inc.  All rights reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -27,6 +28,9 @@
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
 
 #if OMPI_WANT_LIBLTDL
 #include "opal/libltdl/ltdl.h"