removed duplicate free

This commit was SVN r5312.

src/mca/rds/hostfile/rds_hostfile.c

@@ -222,9 +222,6 @@ static int orte_rds_hostfile_query(void)
         goto cleanup;
     }
 
-    if (NULL != mca_rds_hostfile_component.path) {
-        free(mca_rds_hostfile_component.path);
-    }
     rc = mca_base_param_find("rds", "hostfile", "path");
     mca_base_param_lookup_string(rc, &mca_rds_hostfile_component.path);
     rc = orte_rds_hostfile_parse(mca_rds_hostfile_component.path, &existing, &updates);
@@ -243,6 +240,7 @@ static int orte_rds_hostfile_query(void)
 cleanup:
     if (NULL != mca_rds_hostfile_component.path) {
         free(mca_rds_hostfile_component.path);
+        mca_rds_hostfile_component.path = NULL;
     }
     
     while(NULL != (item = ompi_list_remove_first(&existing))) {