BUG: Caught a few uninitialized vectors in charts.

The missed X initialization in vtkAxis was cauing some rengering issues.

Change-Id: Ibdc472b539162fda0afc415ce96ded40438697a2

Charts/vtkAxis.cxx

-
 /*=========================================================================
 
   Program:   Visualization Toolkit
@@ -44,8 +43,8 @@ vtkAxis::vtkAxis()
   this->Position = -1;
   this->Point1 = this->Position1.GetData();
   this->Point2 = this->Position2.GetData();
-  this->Position1.SetY(10.0);
-  this->Position2.SetY(10.0);
+  this->Position1.Set(0.0, 10.0);
+  this->Position2.Set(0.0, 10.0);
   this->TickInterval = 1.0;
   this->NumberOfTicks = -1;
   this->LabelProperties = vtkTextProperty::New();

Charts/vtkChartLegend.cxx

@@ -38,7 +38,7 @@
 class vtkChartLegend::Private
 {
 public:
-  Private()
+  Private() : Point(0, 0)
   {
   }
   ~Private()

Charts/vtkChartXY.cxx

@@ -257,7 +257,7 @@ bool vtkChartXY::Paint(vtkContext2D *painter)
     return false;
     }
 
-  vtkVector2i geometry;
+  vtkVector2i geometry(0, 0);
   bool recalculateTransform = false;
   if (this->LayoutStrategy == vtkChart::FILL_SCENE)
     {
@@ -801,7 +801,7 @@ int vtkChartXY::GetLegendBorder(vtkContext2D* painter, int axisPosition)
     }
 
   int padding = 10;
-  vtkVector2i legendSize;
+  vtkVector2i legendSize(0, 0);
   vtkVector2i legendAlignment(this->Legend->GetHorizontalAlignment(),
                               this->Legend->GetVerticalAlignment());
   this->Legend->Update();
@@ -846,7 +846,7 @@ int vtkChartXY::GetLegendBorder(vtkContext2D* painter, int axisPosition)
 void vtkChartXY::SetLegendPosition(const vtkRectf& rect)
 {
   // Put the legend in the top corner of the chart
-  vtkVector2f pos;
+  vtkVector2f pos(0, 0);
   int padding = 5;
   vtkVector2i legendAlignment(this->Legend->GetHorizontalAlignment(),
                               this->Legend->GetVerticalAlignment());

Charts/vtkContext2D.cxx

@@ -741,7 +741,7 @@ vtkVector2f vtkContext2D::CalculateTextPosition(vtkPoints2D* rect)
     return vtkVector2f();
     }
 
-  vtkVector2f p;
+  vtkVector2f p(0, 0);
   float *f = vtkFloatArray::SafeDownCast(rect->GetData())->GetPointer(0);
 
   if (this->Device->GetTextProp()->GetJustification() == VTK_TEXT_LEFT)

Rendering/vtkFreeTypeStringToImage.cxx

@@ -73,7 +73,7 @@ vtkVector2i vtkFreeTypeStringToImage::GetBounds(vtkTextProperty *property,
 vtkVector2i vtkFreeTypeStringToImage::GetBounds(vtkTextProperty *property,
                                                 const vtkStdString& string)
 {
-  vtkVector2i recti;
+  vtkVector2i recti(0, 0);
   int tmp[4];
   if (!property || string.empty())
     {

Rendering/vtkQtStringToImage.cxx

@@ -88,7 +88,7 @@ vtkQtStringToImage::~vtkQtStringToImage()
 vtkVector2i vtkQtStringToImage::GetBounds(vtkTextProperty *property,
                                           const vtkUnicodeString& string)
 {
-  vtkVector2i recti;
+  vtkVector2i recti(0, 0);
   if (!QApplication::instance())
     {
     vtkErrorMacro("You must initialize a QApplication before using this class.");
@@ -119,7 +119,7 @@ vtkVector2i vtkQtStringToImage::GetBounds(vtkTextProperty *property,
 vtkVector2i vtkQtStringToImage::GetBounds(vtkTextProperty *property,
                                           const vtkStdString& string)
 {
-  vtkVector2i recti;
+  vtkVector2i recti(0, 0);
   if (!QApplication::instance())
     {
     vtkErrorMacro("You must initialize a QApplication before using this class.");