Add missing include

Author: Ralph Castain

ompi/mca/fs/base/fs_base_get_parent_dir.c

@@ -5,15 +5,16 @@
  * Copyright (c) 2004-2011 The University of Tennessee and The University
  *                         of Tennessee Research Foundation.  All rights
  *                         reserved.
- * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
+ * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
  * Copyright (c) 2008-2011 University of Houston. All rights reserved.
+ * Copyright (c) 2016      Intel, Inc. All rights reserved.
  * $COPYRIGHT$
- * 
+ *
  * Additional copyrights may follow
- * 
+ *
  * $HEADER$
  */
 
@@ -28,8 +29,11 @@
 #include "ompi/mca/fs/fs.h"
 #include "ompi/mca/fs/base/base.h"
 
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 #ifdef HAVE_SYS_STATFS_H
-#include <sys/statfs.h> /* or <sys/vfs.h> */ 
+#include <sys/statfs.h> /* or <sys/vfs.h> */
 #endif
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
@@ -47,7 +51,7 @@ void mca_fs_base_get_parent_dir ( char *filename, char **dirnamep)
     int err;
     char *dir = NULL, *slash;
     struct stat statbuf;
-    
+
 
 
     err = lstat(filename, &statbuf);