COMP: GPUPDEDeformableRegistrationFilter.cl fails to "compile".

The failure happens on Mac OS 10.8 with Intel OpenCL.
It is due to a non OpenCL conformant signature for the GPUPDEDeformableRegistrationFilter.cl
function, cf. http://software.intel.com/en-us/forums/topic/280040
Merge topic 'GetImageOffsetNonOpenCLConformant'

2c217a7 COMP: GPUPDEDeformableRegistrationFilter.cl fails to "compile".