BUG: Color table ID was not properly set in vtkIGTLToMRMLImage.cxx.
COMP: Fix unused variable warning reported in Slicer Bug tracking 3665 / Github issue #30
Merge pull request #31 from tokjun/3665-unused-variable-warnings

COMP: Fix unused variable warning reported in Slicer Bug tracking 3665 / Github issue #30.
Conflicts:
	MRML/vtkIGTLToMRMLImage.cxx