Fix conversion warnings. Refs #7363

Code/Mantid/Vates/ParaviewPlugins/ParaViewSources/MDHWSource/vtkMDHWSource.cxx

@@ -234,7 +234,7 @@ int vtkMDHWSource::RequestInformation(vtkInformation *vtkNotUsed(request), vtkIn
   m_presenter->executeLoadMetadata();
   setTimeRange(outputVector);
   std::vector<int> extents = dynamic_cast<MDHWInMemoryLoadingPresenter*>(m_presenter)->getExtents();
-  outputVector->GetInformationObject(0)->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),&extents[0],extents.size());
+  outputVector->GetInformationObject(0)->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),&extents[0],static_cast<int>(extents.size()));
 
   return 1;
 }

Code/Mantid/Vates/VatesAPI/src/MDHWInMemoryLoadingPresenter.cpp

@@ -158,9 +158,9 @@ namespace Mantid
       Workspace_sptr ws = m_repository->fetchWorkspace(m_wsName);
       IMDHistoWorkspace_sptr histoWs = boost::dynamic_pointer_cast<Mantid::API::IMDHistoWorkspace>(ws);
       std::vector<int> extents(6, 0);
-      extents[1] = histoWs->getDimension(0)->getNBins();
-      extents[3] = histoWs->getDimension(1)->getNBins();
-      extents[5] = histoWs->getDimension(2)->getNBins();
+      extents[1] = static_cast<int>(histoWs->getDimension(0)->getNBins());
+      extents[3] = static_cast<int>(histoWs->getDimension(1)->getNBins());
+      extents[5] = static_cast<int>(histoWs->getDimension(2)->getNBins());
       
       return extents;
     }