feat：修复部分错误

@@ -125,10 +125,12 @@ class CmBroker
     }
     public function init()
     {
-        $this->initPosMode();
         $this->initSymbolInfos();
+        if ($this->plat == self::PLAT_OKX && $this->apiInfo && $this->apiInfo->key != '') {
+            $this->initPosMode();
             $this->initPositions();
         }
+    }
     public function accListen(callable $onData)
     {
         $this->exBroker->accListen(function ($data) use ($onData) {