fixed coding style issues found by ngx-releng. alas.

Author: agentzh

src/ngx_stream_lua_util.c

@@ -1728,10 +1728,10 @@ ngx_stream_lua_run_posted_threads(ngx_connection_t *c, lua_State *L,
         /* rc == NGX_ERROR || rc >= NGX_OK */
 
 #if 1
-	if (rc == NGX_OK) {
-	    ngx_stream_lua_finalize_session(s, NGX_OK);
-	    return NGX_DONE;
-	}
+        if (rc == NGX_OK) {
+            ngx_stream_lua_finalize_session(s, NGX_OK);
+            return NGX_DONE;
+        }
 #endif
 
         return rc;