Dead children have no pid

This commit was SVN r24387.

orte/mca/odls/base/odls_base_default_fns.c

@@ -2915,6 +2915,7 @@ int orte_odls_base_default_kill_local_procs(opal_pointer_array_t *procs,
                  * it already hasn't
                  */
                 child->waitpid_recvd = true;
+                child->pid = 0;
                 goto CLEANUP;
             }
 
@@ -2984,6 +2985,7 @@ int orte_odls_base_default_kill_local_procs(opal_pointer_array_t *procs,
             child->waitpid_recvd = true;
             /* ensure the process is flagged as "not alive" */
             child->alive = false;
+            child->pid = 0;
             
         CLEANUP:
             /* ensure the child's session directory is cleaned up */