pmix/s2: fix srun native launch for pmi2

recent changes that broke native launch on cray
using srun or aprun was also broke native launch
using pmi2.

This commit fixes this problem.

Signed-off-by: Howard Pritchard <howardp@lanl.gov>

opal/mca/pmix/s2/pmix_s2.c

@@ -3,7 +3,7 @@
  * Copyright (c) 2007      The Trustees of Indiana University.
  *                         All rights reserved.
  * Copyright (c) 2011-2016 Cisco Systems, Inc.  All rights reserved.
- * Copyright (c) 2011-2013 Los Alamos National Security, LLC. All
+ * Copyright (c) 2011-2017 Los Alamos National Security, LLC. All
  *                         rights reserved.
  * Copyright (c) 2013-2017 Intel, Inc. All rights reserved.
  * Copyright (c) 2014-2016 Research Organization for Information Science
@@ -175,6 +175,7 @@ static int s2_init(opal_list_t *ilist)
     opal_process_name_t wildcard_rank;
 
     if (0 < pmix_init_count) {
+        ++pmix_init_count;
         return OPAL_SUCCESS;
     }
 
@@ -425,13 +426,13 @@ static int s2_fini(void) {
 
     if (0 == --pmix_init_count) {
         PMI2_Finalize();
-    }
-    if (NULL != pmix_kvs_name) {
-        free(pmix_kvs_name);
-        pmix_kvs_name = NULL;
-    }
-    if (NULL != s2_lranks) {
-        free(s2_lranks);
+        if (NULL != pmix_kvs_name) {
+            free(pmix_kvs_name);
+            pmix_kvs_name = NULL;
+        }
+        if (NULL != s2_lranks) {
+            free(s2_lranks);
+        }
     }
     return OPAL_SUCCESS;
 }