feat:健壮部分判断

@@ -351,17 +351,17 @@ class ExBroker
             'instId' => $symbol,
         ];
         $res = $this->api->getPositions($param);
-        if ($res['code'] == 0) {
+        if (isset($res['code']) && $res['code'] == 0) {
             $positions = $res['data'];
             foreach ($positions as $key => $value) {
                 if ($value['posSide'] == $posSide) {
                     return $value['pos'];
                 }
             }
-            output("查询仓位为0:", $symbol, $posSide, $res);
+            output("查询仓位为0:", $symbol, $posSide, "res:", $res);
             return 0;
         } else {
-            output("查询仓位出错:", $symbol, $posSide, $res);
+            output("查询仓位出错:", $symbol, $posSide, "res:", $res);
         }
         return false;
     }