feat: 修改cppcheck告警

修改一个枚举未初始化告警

Log: 修改cppcheck告警
Change-Id: I509f398b1ad3e53c30bf7c442f3248772f506816
Reviewed-on: http://gerrit.uniontech.com/c/dde-dock/+/6753
Reviewed-by: <mailman@uniontech.com>
Reviewed-by: fanpengcheng <fanpengcheng@uniontech.com>
Tested-by: <mailman@uniontech.com>

plugins/sound/soundapplet.cpp

@@ -49,6 +49,7 @@ Q_DECLARE_METATYPE(const Port *)
 Port::Port(QObject *parent)
     : QObject(parent)
     , m_isActive(false)
+    , m_direction(Out)
 {
 
 }