Fix some Coverity uninitialized variable warnings

Author: nyalldawson

src/app/qgisapp.h

@@ -1523,6 +1523,7 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
             , mDeletePart( nullptr )
             , mNodeTool( nullptr )
             , mRotatePointSymbolsTool( nullptr )
+            , mOffsetPointSymbolTool( nullptr )
             , mAnnotation( nullptr )
             , mFormAnnotation( nullptr )
             , mHtmlAnnotation( nullptr )

src/app/qgsbookmarks.cpp

@@ -34,7 +34,8 @@
 #include <QAbstractTableModel>
 
 
-QgsBookmarks::QgsBookmarks( QWidget *parent ) : QDockWidget( parent )
+QgsBookmarks::QgsBookmarks( QWidget *parent )
+    : QDockWidget( parent )
 {
   setupUi( this );
   restorePosition();
@@ -490,10 +491,11 @@ bool QgsProjectBookmarksTableModel::removeRows( int row, int count, const QModel
   return true;
 }
 
-QgsMergedBookmarksTableModel::QgsMergedBookmarksTableModel( QAbstractTableModel& qgisTableModel, QAbstractTableModel& projectTableModel, QTreeView* treeView ):
-    mQgisTableModel( qgisTableModel ),
-    mProjectTableModel( projectTableModel ),
-    mTreeView( treeView )
+QgsMergedBookmarksTableModel::QgsMergedBookmarksTableModel( QAbstractTableModel& qgisTableModel, QAbstractTableModel& projectTableModel, QTreeView* treeView )
+    : mQgisTableModel( qgisTableModel )
+    , mProjectTableModel( projectTableModel )
+    , mTreeView( treeView )
+    , mProjectOpen( false )
 {
   connect(
     QgisApp::instance(), SIGNAL( projectRead() ),
@@ -674,7 +676,12 @@ void QgsMergedBookmarksTableModel::moveBookmark( QAbstractTableModel& modelFrom,
     query.bindValue( ":ymax", modelFrom.data( modelFrom.index( row, 6 ) ).toDouble() );
     query.bindValue( ":projection_srid", modelFrom.data( modelFrom.index( row, 7 ) ).toInt() );
 
-    query.exec();
+    if ( !query.exec() )
+    {
+      QgsDebugMsg( QString( "Could not move bookmark: %1" )
+                   .arg( query.lastError().text() ) );
+      return;
+    }
     qgisModel->setSort( 0, Qt::AscendingOrder );
     qgisModel->select();
   }

src/gui/qgscolordialog.cpp

@@ -69,6 +69,7 @@ QColor QgsColorDialog::getLiveColor( const QColor& initialColor, QObject* update
 QgsColorDialogV2::QgsColorDialogV2( QWidget *parent, const Qt::WindowFlags& fl, const QColor& color )
     : QDialog( parent, fl )
     , mPreviousColor( color )
+    , mAllowAlpha( true )
 {
   setupUi( this );
 

src/gui/symbology-ng/qgsvectorgradientcolorrampv2dialog.h

@@ -24,7 +24,6 @@ class QgsVectorGradientColorRampV2;
 class QwtPlot;
 class QwtPlotCurve;
 class QwtPlotMarker;
-class QwtPlotPicker;
 class QgsGradientPlotEventFilter;
 
 class GUI_EXPORT QgsVectorGradientColorRampV2Dialog : public QDialog, private Ui::QgsVectorGradientColorRampV2DialogBase
@@ -69,7 +68,6 @@ class GUI_EXPORT QgsVectorGradientColorRampV2Dialog : public QDialog, private Ui
     QwtPlotCurve* mHueCurve;
     QwtPlotCurve* mAlphaCurve;
     QList< QwtPlotMarker* > mMarkers;
-    QwtPlotPicker* mPicker;
     QgsGradientPlotEventFilter* mPlotFilter;
     int mCurrentPlotColorComponent;
     int mCurrentPlotMarkerIndex;