More Linux fixes.

Rendering/OpenVR/vtkOpenVRMenuRepresentation.cxx

@@ -50,7 +50,7 @@ class vtkOpenVRMenuRepresentation::InternalElement
     vtkCommand *Command;
     std::string Name;
 
-  vtkOpenVRMenuRepresentation::InternalElement() {
+  InternalElement() {
     vtkTextProperty *prop = this->TextActor->GetTextProperty();
     this->TextActor->ForceOpaqueOn();
 

Rendering/OpenVR/vtkOpenVRMenuWidget.cxx

@@ -38,7 +38,7 @@ class vtkOpenVRMenuWidget::InternalElement
     vtkCommand *Command;
     std::string Name;
     std::string Text;
-  vtkOpenVRMenuRepresentation::InternalElement() {
+  InternalElement() {
   }
 };