Fix screensaver lock time bug.

src/forms/settings/GeneralForm.cpp

@@ -141,6 +141,7 @@ GeneralForm::GeneralForm(QWidget* aParent)
             {
                 JsonObject::Instance()->setLockScreenTimeout(QString::number(second));
                 lockTime->setText(toTimeString(second));
+                Locker::getInstance()->setTimer(-1);
                 Locker::getInstance()->setIsEnable(false);
                 return;
             }

src/screensaver/ScreenSaverWindow.cpp

@@ -144,5 +144,5 @@ void ScreenSaverWindow::handleVideoStatusChanged(QMediaPlayer::MediaStatus aStat
 
 void ScreenSaverWindow::startLocker()
 {
-    Locker::getInstance()->start();
+    Locker::getInstance()->setIsEnable(true);
 }

src/utilities/Locker.cpp

@@ -31,7 +31,7 @@ Locker::~Locker()
 
 void Locker::start()
 {
-    if (mIsEnable)
+    if (mIsEnable && mCounter > 0)
     {
         mScreenTimer->stop();
         mScreenTimer->start(mCounter);
@@ -69,7 +69,7 @@ void Locker::setTimer(int aInterval)
 }
 void Locker::refreshTimer()
 {
-    if (mIsEnable)
+    if (mIsEnable && mCounter > 0)
     {
         mScreenTimer->stop();
         mScreenTimer->start(mCounter);