feat：仓位查询打印

@@ -358,6 +358,7 @@ class ExBroker
                     return $value['pos'];
                 }
             }
+            output("查询仓位为0:", $symbol, $posSide, $res);
             return 0;
         } else {
             output("查询仓位出错:", $symbol, $posSide, $res);