fix compiler warnings in RELEASE mode under Windows

reg. possible uninitialized use of some variables and some unused
parameters

libmscore/layout.cpp

@@ -2022,7 +2022,7 @@ qreal Score::cautionaryWidth(Measure* m, bool& hasCourtesy)
       Segment* ns       = nm->findSegment(Segment::Type::TimeSig, tick);
       bool showCourtesy = styleB(StyleIdx::genCourtesyTimesig);
 
-      qreal w;
+      qreal w = 0.0;
       if (showCourtesy && ns) {
             TimeSig* ts = static_cast<TimeSig*>(ns->element(0));
             if (ts && ts->showCourtesySig()) {
@@ -2039,8 +2039,6 @@ qreal Score::cautionaryWidth(Measure* m, bool& hasCourtesy)
                         }
                   }
             }
-      else
-            w = 0.0;
 
       // courtesy key signatures
 

libmscore/paste.cpp

@@ -78,7 +78,7 @@ bool Score::pasteStaff(XmlReader& e, Segment* dst, int dstStaff)
       int dstTick = dst->tick();
       bool done = false;
       bool pasted = false;
-      int tickLen, staves;
+      int tickLen, staves = 0;
       while (e.readNextStartElement()) {
             if (done)
                   break;

libmscore/score.cpp

@@ -3066,7 +3066,7 @@ void Score::lassoSelectEnd()
       Segment* endSegment   = 0;
       int startStaff        = 0x7fffffff;
       int endStaff          = 0;
-      const ChordRest* endCR;
+      const ChordRest* endCR = 0;
 
       if (_selection.elements().isEmpty()) {
             _selection.setState(SelState::NONE);

libmscore/staff.cpp

@@ -612,7 +612,7 @@ qreal Staff::mag() const
 SwingParameters Staff::swing(int tick) const
       {
       SwingParameters sp;
-      int swingUnit;
+      int swingUnit = 0;
       QString unit = score()->styleSt(StyleIdx::swingUnit);
       int swingRatio = score()->styleI(StyleIdx::swingRatio);
       if (unit == TDuration(TDuration::DurationType::V_EIGHTH).name()) {

mscore/file.cpp

@@ -552,7 +552,7 @@ void MuseScore::newFile()
             score->fileInfo()->setFile(newWizard->title());
       Measure* pm = score->firstMeasure();
 
-      Measure* nm;
+      Measure* nm = 0;
       for (int i = 0; i < measures; ++i) {
             if (pm) {
                   nm  = pm;

mscore/importgtp-gp6.cpp

@@ -589,8 +589,8 @@ Fraction GuitarPro6::rhythmToDuration(QString value)
 
 void GuitarPro6::readDrumNote(Note* note, int element, int variation)
       {
-      int octaveInt;
+      int octaveInt = 0;
-      int toneInt;
+      int toneInt = 0;
       /* These numbers below were determined by creating all drum
        * notes in a GPX format file and then analyzing the score.gpif
        * file which specifies the score. */

mscore/importmidi/importmidi_quant.cpp

@@ -56,7 +56,7 @@ ReducedFraction quantValueToFraction(MidiOperations::QuantValue quantValue)
 MidiOperations::QuantValue fractionToQuantValue(const ReducedFraction &fraction)
       {
       const auto division = ReducedFraction::fromTicks(MScore::division);
-       MidiOperations::QuantValue quantValue;
+       MidiOperations::QuantValue quantValue = MidiOperations::QuantValue::Q_4;
 
       if (fraction == division)
             quantValue = MidiOperations::QuantValue::Q_4;
@@ -815,6 +815,9 @@ void findChordRangeEnds(
             const ReducedFraction &barStart,
             const ReducedFraction &beatLen)
       {
+#ifdef NDEBUG
+      (void)rangeStart;
+#endif
       for (auto it = data.rbegin(); it != data.rend(); ++it) {
             QuantData &d = *it;
             d.chordRangeEnd = barStart + quantizeToSmall(rangeEnd - barStart, d.quant);

mscore/importmidi/importmidi_tuplet.cpp

@@ -1088,6 +1088,9 @@ void findAllTuplets(
             const ReducedFraction &lastTick,
             const ReducedFraction &basicQuant)
       {
+#ifdef NDEBUG
+      (void)lastTick;
+#endif
       if (chords.empty())
             return;
 

mscore/importmidi/importmidi_tuplet_voice.cpp

@@ -455,6 +455,9 @@ void setVoicesFromPrevBars(
             const ReducedFraction &basicQuant,
             const ReducedFraction &barStart)
       {
+#ifdef NDEBUG
+      (void)pendingNonTuplets;
+#endif
       bool loopAgain = false;
       do {
             for (auto it = backTiedTuplets.begin(); it != backTiedTuplets.end(); ) {

mscore/inspector/inspector.cpp

@@ -910,7 +910,7 @@ void InspectorBarLine::spanTypeChanged(int idx)
       Score*      score = bl->score();
       score->startCmd();
 
-      int spanStaves, spanFrom, spanTo;
+      int spanStaves, spanFrom = 0, spanTo = 0;
       // the amount to adjust To value of short types, if staff num. of lines != 5
       int shortDelta = bl->staff() ? (bl->staff()->lines() - 5)*2 : 0;
       spanStaves = 1;               // in most cases, num. of spanned staves is 1

thirdparty/kQOAuth/kqoauthmanager.cpp

@@ -306,7 +306,7 @@ void KQOAuthManager::executeAuthorizedRequest(KQOAuthRequest *request, int id) {
     }
     networkRequest.setRawHeader("Authorization", authHeader);
 
-    QNetworkReply *reply;
+    QNetworkReply *reply = 0;
 
     if (request->httpMethod() == KQOAuthRequest::POST) {