Silence redefinition warning

Signed-off-by: Ralph Castain <[email protected]>

Author: Ralph Castain

opal/mca/pmix/pmix2x/pmix2x.h

@@ -1,6 +1,6 @@
 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
 /*
- * Copyright (c) 2014-2017 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2014-2018 Intel, Inc. All rights reserved.
  * Copyright (c) 2014-2015 Mellanox Technologies, Inc.
  *                         All rights reserved.
  * Copyright (c) 2016      Research Organization for Information Science
@@ -38,6 +38,9 @@
 BEGIN_C_DECLS
 
 #ifdef OPAL_C_HAVE_VISIBILITY
+  #ifdef PMIX_HAVE_VISIBILITY
+    #undef PMIX_HAVE_VISIBILITY
+  #endif
 #define PMIX_HAVE_VISIBILITY 1
 #else
 #undef PMIX_HAVE_VISIBILITY