Index: vtkVolumeRayCastMapper.cxx
===================================================================
RCS file: /cvsroot/VTK/VTK/VolumeRendering/vtkVolumeRayCastMapper.cxx,v
retrieving revision 1.6
diff -u -r1.6 vtkVolumeRayCastMapper.cxx
--- vtkVolumeRayCastMapper.cxx	17 Feb 2009 17:25:03 -0000	1.6
+++ vtkVolumeRayCastMapper.cxx	10 Jun 2009 17:37:01 -0000
@@ -1369,8 +1369,8 @@
     (this->ImageViewportSize[1]-1):(maxY);
 
   // Create the new image, and set its size and position
-  this->ImageInUseSize[0] = static_cast<int>(maxX - minX + 1.0);
-  this->ImageInUseSize[1] = static_cast<int>(maxY - minY + 1.0);
+  this->ImageInUseSize[0] = static_cast<int>(maxX) - static_cast<int>(minX) + 1 ;
+  this->ImageInUseSize[1] = static_cast<int>(maxY) - static_cast<int>(minY) + 1 ;
 
   // What is a power of 2 size big enough to fit this image?
   this->ImageMemorySize[0] = 32;