Fixed up a bunch of compiler warnings.

There should be no functional difference, just less noise when compiling

re/filecomparatorwindow.cpp

@@ -118,8 +118,8 @@ void FileComparatorWindow::calculateDetails()
 {
     QMap<int, FrameData> interestedIDs;
     QMap<int, FrameData> referenceIDs;
-    QTreeWidgetItem *interestedOnlyBase, *referenceOnlyBase = NULL, *sharedBase, *bitmapBaseInterested, *bitmapBaseReference = NULL;
-    QTreeWidgetItem *valuesBase, *detail, *sharedItem, *valuesInterested, *valuesReference = NULL;
+    QTreeWidgetItem *interestedOnlyBase, *referenceOnlyBase = nullptr, *sharedBase, *bitmapBaseInterested, *bitmapBaseReference = nullptr;
+    QTreeWidgetItem *valuesBase, *detail, *sharedItem, *valuesInterested, *valuesReference = nullptr;
     uint64_t tmp;
 
     bool uniqueInterested = ui->ckUniqueToInterested->isChecked();

re/frameinfowindow.cpp

@@ -186,7 +186,7 @@ void FrameInfoWindow::updatedFrames(int numFrames)
 
         unsigned int currID = 0;
         if (ui->listFrameID->currentItem())
-            currID = (unsigned int)ui->listFrameID->currentItem()->text().toInt(NULL, 16);
+            currID = (unsigned int)ui->listFrameID->currentItem()->text().toInt(nullptr, 16);
         bool thisID = false;
         for (int x = modelFrames->count() - numFrames; x < modelFrames->count(); x++)
         {

re/graphingwindow.cpp

@@ -1186,7 +1186,7 @@ void GraphingWindow::createGraph(GraphParams &params, bool createGraphParam)
     selDecorator->setPen(selectedPen);
     ui->graphingView->graph()->setSelectionDecorator(selDecorator);
 
-    if (params.graphName == NULL || params.graphName.length() == 0)
+    if (params.graphName == nullptr || params.graphName.length() == 0)
     {
         params.graphName = QString("0x") + QString::number(params.ID, 16) + ":" + QString::number(params.startBit);
         params.graphName += "-" + QString::number(params.numBits);

re/isotp_interpreterwindow.cpp

@@ -115,14 +115,14 @@ void ISOTP_InterpreterWindow::writeSettings()
 void ISOTP_InterpreterWindow::interpretCapturedFrames()
 {
     clearList();
-    decoder->rapidFrames(NULL, *modelFrames);
+    decoder->rapidFrames(nullptr, *modelFrames);
 }
 
 void ISOTP_InterpreterWindow::listFilterItemChanged(QListWidgetItem *item)
 {
     if (item)
     {
-        int id = item->text().toInt(NULL, 16);
+        int id = item->text().toInt(nullptr, 16);
         bool state = item->checkState();
         //qDebug() << id << "*" << state;
         idFilters[id] = state;
@@ -134,7 +134,7 @@ void ISOTP_InterpreterWindow::filterAll()
     for (int i = 0 ; i < ui->listFilter->count(); i++)
     {
         ui->listFilter->item(i)->setCheckState(Qt::Checked);
-        idFilters[ui->listFilter->item(1)->text().toInt(NULL, 16)] = true;
+        idFilters[ui->listFilter->item(1)->text().toInt(nullptr, 16)] = true;
     }
 }
 
@@ -143,7 +143,7 @@ void ISOTP_InterpreterWindow::filterNone()
     for (int i = 0 ; i < ui->listFilter->count(); i++)
     {
         ui->listFilter->item(i)->setCheckState(Qt::Unchecked);
-        idFilters[ui->listFilter->item(1)->text().toInt(NULL, 16)] = false;
+        idFilters[ui->listFilter->item(1)->text().toInt(nullptr, 16)] = false;
     }
 }
 

re/newgraphdialog.cpp

@@ -212,7 +212,7 @@ void NewGraphDialog::loadMessages()
 {
     DBC_MESSAGE *msg;
     ui->cbMessages->clear();
-    if (dbcHandler == NULL) return;
+    if (dbcHandler == nullptr) return;
     if (dbcHandler->getFileCount() == 0) return;
     for (int y = 0; y < dbcHandler->getFileCount(); y++)
     {
@@ -240,7 +240,7 @@ void NewGraphDialog::loadSignals(int idx)
     DBC_MESSAGE *msg = dbcHandler->findMessage(ui->cbMessages->currentText());
     DBC_SIGNAL *sig;
 
-    if (msg == NULL) return;
+    if (msg == nullptr) return;
 
     ui->cbSignals->clear();
     for (int x = 0; x < msg->sigHandler->getCount(); x++)

re/sniffer/snifferwindow.cpp

@@ -61,7 +61,7 @@ SnifferWindow::SnifferWindow(QWidget *parent) :
 
 SnifferWindow::~SnifferWindow()
 {
-    closeEvent(NULL);
+    closeEvent(nullptr);
     delete sniffDel;
     delete ui;
 }

re/udsscanwindow.cpp

@@ -218,9 +218,9 @@ void UDSScanWindow::scanUDS()
 
     ui->treeResults->clear();
     sendingFrames.clear();
-    nodeService = NULL;
-    nodeID = NULL;
-    nodeSubFunc = NULL;
+    nodeService = nullptr;
+    nodeID = nullptr;
+    nodeSubFunc = nullptr;
 
     UDS_MESSAGE test;
     int typ, id;