Modernize code

src/mbox_p.cpp

@@ -13,12 +13,9 @@
 using namespace KMBox;
 
 MBoxPrivate::MBoxPrivate(MBox *mbox)
-    : mInitialMboxFileSize(0)
-    , mMBox(mbox)
+    : mMBox(mbox)
     , mSeparatorMatcher(QStringLiteral("^From .*[0-9][0-9]:[0-9][0-9]"))
     , mLockType(MBox::None)
-    , mFileLocked(false)
-    , mReadOnly(false)
 {
     connect(&mUnlockTimer, &QTimer::timeout, this, &MBoxPrivate::unlockMBox);
 }

src/mbox_p.h

@@ -41,7 +41,7 @@ public:
     MBoxEntry::List mEntries;
     quint64 mInitialMboxFileSize = 0;
     QString mLockFileName;
-    MBox *mMBox = nullptr;
+    MBox *const mMBox;
     QFile mMboxFile;
     QTimer mUnlockTimer;
     QRegExp mSeparatorMatcher;