Fix set get test.

Now that these kits are wrapped in tcl, the set/get smoke test
caught two return uninitialized ivar bugs.

Change-Id: I6a9092a9151171d1709279d79016010c6bcb351d

Charts/vtkContext2D.cxx

@@ -639,7 +639,11 @@ void vtkContext2D::ApplyPen(vtkPen *pen)
 //-----------------------------------------------------------------------------
 vtkPen* vtkContext2D::GetPen()
 {
-  return this->Device->GetPen();
+  if (this->Device)
+    {
+    return this->Device->GetPen();
+    }
+  return NULL;
 }
 
 //-----------------------------------------------------------------------------
@@ -651,7 +655,11 @@ void vtkContext2D::ApplyBrush(vtkBrush *brush)
 //-----------------------------------------------------------------------------
 vtkBrush* vtkContext2D::GetBrush()
 {
-  return this->Device->GetBrush();
+  if (this->Device)
+    {
+    return this->Device->GetBrush();
+    }
+  return NULL;
 }
 
 //-----------------------------------------------------------------------------
@@ -663,7 +671,11 @@ void vtkContext2D::ApplyTextProp(vtkTextProperty *prop)
 //-----------------------------------------------------------------------------
 vtkTextProperty* vtkContext2D::GetTextProp()
 {
-  return this->Device->GetTextProp();
+  if (this->Device)
+    {
+    return this->Device->GetTextProp();
+    }
+  return NULL;
 }
 
 //-----------------------------------------------------------------------------
@@ -678,8 +690,12 @@ void vtkContext2D::SetTransform(vtkTransform2D *transform)
 //-----------------------------------------------------------------------------
 vtkTransform2D* vtkContext2D::GetTransform()
 {
-  this->Device->GetMatrix(this->Transform->GetMatrix());
-  return this->Transform;
+  if (this->Device && this->Transform)
+    {
+    this->Device->GetMatrix(this->Transform->GetMatrix());
+    return this->Transform;
+    }
+  return NULL;
 }
 
 //-----------------------------------------------------------------------------

Chemistry/vtkProgrammableElectronicData.cxx

@@ -98,6 +98,11 @@ void vtkProgrammableElectronicData::SetNumberOfMOs(vtkIdType size)
 //----------------------------------------------------------------------------
 vtkImageData * vtkProgrammableElectronicData::GetMO(vtkIdType orbitalNumber)
 {
+  if (orbitalNumber <= 0)
+    {
+    vtkWarningMacro(<< "Request for invalid orbital number "<<orbitalNumber);
+    return NULL;
+    }
   if (orbitalNumber > static_cast<vtkIdType>(this->MOs->size()))
     {
     vtkWarningMacro(<< "Request for orbital number " << orbitalNumber
@@ -117,6 +122,11 @@ vtkImageData * vtkProgrammableElectronicData::GetMO(vtkIdType orbitalNumber)
 void vtkProgrammableElectronicData::SetMO(vtkIdType orbitalNumber,
                                           vtkImageData *data)
 {
+  if (orbitalNumber <= 0)
+    {
+    vtkErrorMacro("Cannot set invalid orbital number "<<orbitalNumber);
+    return;
+    }
   if (orbitalNumber > static_cast<vtkIdType>(this->MOs->size()))
     {
     this->SetNumberOfMOs(orbitalNumber);