- Need stdbool.h if included in userland; additionally protect stdbool / stdarg.h

This commit was SVN r17488.

opal/util/output.h

@@ -64,7 +64,12 @@
 
 #include "opal_config.h"
 
+#ifdef HAVE_STDARG_H
 #include <stdarg.h>
+#endif
+#ifdef HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
 
 #include "opal/class/opal_object.h"