Merge pull request #4051 from rhc54/topic/cov

Silence coverity warnings

opal/mca/pmix/pmix2x/pmix2x_client.c

@@ -80,6 +80,7 @@ int pmix2x_client_init(opal_list_t *ilist)
         }
         /* check the evars for a mismatch */
         if (OPAL_SUCCESS != (dbg = opal_pmix_pmix2x_check_evars())) {
+            OPAL_PMIX_RELEASE_THREAD(&opal_pmix_base.lock);
             return dbg;
         }
     }

opal/mca/pmix/pmix2x/pmix2x_server_south.c

@@ -110,6 +110,7 @@ int pmix2x_server_init(opal_pmix_server_module_t *module,
         }
         /* check the evars for a mismatch */
         if (OPAL_SUCCESS != (dbg = opal_pmix_pmix2x_check_evars())) {
+            OPAL_PMIX_RELEASE_THREAD(&opal_pmix_base.lock);
             return dbg;
         }
     }