Fix multiple regressions that broke compilation with clang.

e633a82: overloaded virtual method errors
0022510: inconsistent missing override error
e358d31: unused private fields
3591f11: unused private fields

oscar/Graphs/MinutesAtPressure.h

@@ -159,8 +159,8 @@ private:
     qint64 m_lastmaxx;
     QPoint last_mouse=QPoint(0,0);
 
-    EventDataType m_last_height=0;     // re-calculate only when needed.
-    int m_last_peaktime=0;      // re-calculate only when needed.
+    //EventDataType m_last_height=0;     // re-calculate only when needed.
+    //int m_last_peaktime=0;      // re-calculate only when needed.
 
     bool isEnabled(ChannelID id) ;
     QString topBarLabel;

oscar/SleepLib/loader_plugins/intellipap_loader.cpp

@@ -914,16 +914,16 @@ public:
     bool save(QByteArray dataBA);  // save the next record in the file
 
 private:
-    DV6_HEADER hdr;       // file header
+    //DV6_HEADER hdr;       // file header
     QString filetype;
     QFile hFile;
 
-    int record_length;      // Length of record block in incoming file
-    const int maxHistFileSize = 20*10e6;   // Maximum size of file before we create a new file
+    //int record_length;      // Length of record block in incoming file
+    //const int maxHistFileSize = 20*10e6;   // Maximum size of file before we create a new file
 
-    int numWritten;     // Number of records written
-    quint32 lastTimestamp;
-    unsigned int wrap_record;
+    //int numWritten;     // Number of records written
+    //quint32 lastTimestamp;
+    //unsigned int wrap_record;
 };
 
 bool RollingBackup::open (const QString filetype, DV6_HEADER * newhdr) {

oscar/SleepLib/loader_plugins/prs1_loader.h

@@ -478,10 +478,6 @@ class PRS1Loader : public CPAPLoader
                       quint16 size, int family, int familyVersion);
 
 
-
-    //! \brief Open a PRS1 data file, and break into data chunks, delivering them to the correct parser.
-    bool OpenFile(Machine *mach, const QString & filename);
-
     QHash<SessionID, Session *> extra_session;
 
     //! \brief PRS1 Data files can store multiple sessions, so store them in this list for later processing.

oscar/SleepLib/loader_plugins/resmed_loader.cpp

@@ -251,7 +251,7 @@ void backupSTRfiles( const QString strpath, const QString importPath, const QStr
                         MachineInfo & info, QMap<QDate, STRFile> & STRmap );                    // forward
 ResMedEDFInfo * fetchSTRandVerify( QString filename, QString serialNumber );                    // forward
 
-int ResmedLoader::Open(const QString & dirpath, ResDaySaveCallback s)                       // alternate for unit testing
+int ResmedLoader::OpenWithCallback(const QString & dirpath, ResDaySaveCallback s)               // alternate for unit testing
 {
     ResDaySaveCallback origCallback = saveCallback;
     saveCallback = s;

oscar/SleepLib/loader_plugins/resmed_loader.h

@@ -134,7 +134,7 @@ class ResmedLoader : public CPAPLoader
     volatile int sessionCount;
     static void SaveSession(ResmedLoader* loader, Session* session);
     ResDaySaveCallback saveCallback;
-    int Open(const QString & dirpath, ResDaySaveCallback s);
+    int OpenWithCallback(const QString & dirpath, ResDaySaveCallback s);
 
 protected:
 //! \brief The STR.edf file is a unique edf file with many signals

oscar/daily.h

@@ -304,7 +304,7 @@ private:
         */
     void UpdateEventsTree(QTreeWidget * tree,Day *day);
 
-    virtual bool eventFilter(QObject *object, QEvent *event) override;
+    virtual bool eventFilter(QObject *object, QEvent *event);
 
     void updateCube();
 

oscar/tests/resmedtests.cpp

@@ -57,7 +57,7 @@ static void parseAndEmitSessionYaml(const QString & path)
     // necessary for testing. Both are used for now in order to introduce the minimal
     // set of changes into the Resmed loader needed for testing.
     s_currentPath = path;
-    s_loader->Open(path, emitSessionYaml);
+    s_loader->OpenWithCallback(path, emitSessionYaml);
 }
 
 void ResmedTests::testSessionsToYaml()