adding protection. dont know how this was missed in the whole big prtection commit

This commit was SVN r3343.

src/tools/ompi_info/ompi_info.cc

@@ -12,9 +12,15 @@
 
 #include <stdio.h>
 #include <ctype.h>
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+#if HAVE_NETDB_H
 #include <netdb.h>
+#endif
+#if HAVE_SYS_PARAM_H
 #include <sys/param.h>
+#endif
 #include <errno.h>
 
 #include "runtime/runtime.h"

src/tools/ompi_info/param.cc

@@ -8,8 +8,12 @@
 #include <string>
 #include <map>
 
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+#if HAVE_SYS_PARAM_H
 #include <sys/param.h>
+#endif
 
 #include "class/ompi_value_array.h"
 #include "util/printf.h"

src/tools/ompi_info/version.cc

@@ -11,6 +11,7 @@
 
 #include "mca/base/base.h"
 #include "tools/ompi_info/ompi_info.h"
+#include "util/printf.h"
 
 using namespace std;
 using namespace ompi_info;