BUG: need to re-initialize color related member variables each read
BUG: need to re-initialize color related member variables each read

Valgrind was detecting errors in GetColor:

==28927== Invalid read of size 2
==28927==    at 0x4E31C75: itk::TIFFImageIO::GetColor(int, unsigned short*, unsigned short*, unsigned short*) (itkTIFFImageIO.cxx:910)

This patch should adress it.

Change-Id: Ic5bfac35801755c9ed1ed8822bc57696966852d2

blowekamp/ITK,spinicist/ITK,atsnyder/ITK,stnava/ITK,Kitware/ITK,hinerm/ITK,malaterre/ITK,Kitware/ITK,hendradarwin/ITK,atsnyder/ITK,PlutoniumHeart/ITK,heimdali/ITK,PlutoniumHeart/ITK,biotrump/ITK,CapeDrew/DCMTK-ITK,GEHC-Surgery/ITK,stnava/ITK,msmolens/ITK,ajjl/ITK,zachary-williamson/ITK,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,GEHC-Surgery/ITK,atsnyder/ITK,jmerkow/ITK,hendradarwin/ITK,BRAINSia/ITK,stnava/ITK,fedral/ITK,cpatrick/ITK-RemoteIO,malaterre/ITK,LucasGandel/ITK,ajjl/ITK,CapeDrew/DCMTK-ITK,zachary-williamson/ITK,hjmjohnson/ITK,eile/ITK,fbudin69500/ITK,fuentesdt/InsightToolkit-dev,hinerm/ITK,biotrump/ITK,fuentesdt/InsightToolkit-dev,blowekamp/ITK,BRAINSia/ITK,itkvideo/ITK,heimdali/ITK,hendradarwin/ITK,biotrump/ITK,LucasGandel/ITK,malaterre/ITK,stnava/ITK,zachary-williamson/ITK,eile/ITK,msmolens/ITK,eile/ITK,malaterre/ITK,CapeDrew/DCMTK-ITK,fedral/ITK,spinicist/ITK,eile/ITK,fedral/ITK,PlutoniumHeart/ITK,BRAINSia/ITK,hendradarwin/ITK,vfonov/ITK,atsnyder/ITK,fedral/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,thewtex/ITK,paulnovo/ITK,zachary-williamson/ITK,BlueBrain/ITK,itkvideo/ITK,cpatrick/ITK-RemoteIO,fbudin69500/ITK,fbudin69500/ITK,biotrump/ITK,GEHC-Surgery/ITK,spinicist/ITK,jcfr/ITK,hinerm/ITK,richardbeare/ITK,BlueBrain/ITK,ajjl/ITK,LucHermitte/ITK,malaterre/ITK,fuentesdt/InsightToolkit-dev,jcfr/ITK,stnava/ITK,jmerkow/ITK,biotrump/ITK,thewtex/ITK,blowekamp/ITK,LucHermitte/ITK,malaterre/ITK,GEHC-Surgery/ITK,richardbeare/ITK,malaterre/ITK,paulnovo/ITK,GEHC-Surgery/ITK,fuentesdt/InsightToolkit-dev,Kitware/ITK,InsightSoftwareConsortium/ITK,BlueBrain/ITK,GEHC-Surgery/ITK,msmolens/ITK,BRAINSia/ITK,LucasGandel/ITK,LucHermitte/ITK,zachary-williamson/ITK,msmolens/ITK,Kitware/ITK,richardbeare/ITK,CapeDrew/DCMTK-ITK,zachary-williamson/ITK,PlutoniumHeart/ITK,vfonov/ITK,fedral/ITK,spinicist/ITK,jcfr/ITK,thewtex/ITK,spinicist/ITK,blowekamp/ITK,paulnovo/ITK,hinerm/ITK,GEHC-Surgery/ITK,fedral/ITK,richardbeare/ITK,paulnovo/ITK,heimdali/ITK,LucasGandel/ITK,GEHC-Surgery/ITK,BlueBrain/ITK,jcfr/ITK,thewtex/ITK,PlutoniumHeart/ITK,atsnyder/ITK,heimdali/ITK,jcfr/ITK,msmolens/ITK,biotrump/ITK,hendradarwin/ITK,Kitware/ITK,zachary-williamson/ITK,cpatrick/ITK-RemoteIO,vfonov/ITK,itkvideo/ITK,msmolens/ITK,ajjl/ITK,rhgong/itk-with-dom,itkvideo/ITK,jmerkow/ITK,fuentesdt/InsightToolkit-dev,fbudin69500/ITK,PlutoniumHeart/ITK,atsnyder/ITK,vfonov/ITK,CapeDrew/DCMTK-ITK,fbudin69500/ITK,LucHermitte/ITK,richardbeare/ITK,thewtex/ITK,hinerm/ITK,jmerkow/ITK,thewtex/ITK,vfonov/ITK,hendradarwin/ITK,BlueBrain/ITK,cpatrick/ITK-RemoteIO,CapeDrew/DCMTK-ITK,hjmjohnson/ITK,rhgong/itk-with-dom,LucasGandel/ITK,InsightSoftwareConsortium/ITK,atsnyder/ITK,eile/ITK,LucasGandel/ITK,BlueBrain/ITK,hjmjohnson/ITK,paulnovo/ITK,PlutoniumHeart/ITK,PlutoniumHeart/ITK,ajjl/ITK,blowekamp/ITK,rhgong/itk-with-dom,hinerm/ITK,hendradarwin/ITK,Kitware/ITK,zachary-williamson/ITK,ajjl/ITK,eile/ITK,paulnovo/ITK,ajjl/ITK,jmerkow/ITK,InsightSoftwareConsortium/ITK,vfonov/ITK,LucHermitte/ITK,richardbeare/ITK,biotrump/ITK,eile/ITK,malaterre/ITK,blowekamp/ITK,eile/ITK,cpatrick/ITK-RemoteIO,LucasGandel/ITK,LucHermitte/ITK,heimdali/ITK,rhgong/itk-with-dom,stnava/ITK,jcfr/ITK,stnava/ITK,rhgong/itk-with-dom,heimdali/ITK,LucasGandel/ITK,stnava/ITK,Kitware/ITK,fedral/ITK,vfonov/ITK,hinerm/ITK,spinicist/ITK,heimdali/ITK,blowekamp/ITK,paulnovo/ITK,malaterre/ITK,BRAINSia/ITK,thewtex/ITK,spinicist/ITK,fuentesdt/InsightToolkit-dev,blowekamp/ITK,vfonov/ITK,cpatrick/ITK-RemoteIO,fbudin69500/ITK,eile/ITK,heimdali/ITK,InsightSoftwareConsortium/ITK,itkvideo/ITK,msmolens/ITK,vfonov/ITK,rhgong/itk-with-dom,fedral/ITK,BRAINSia/ITK,jmerkow/ITK,richardbeare/ITK,LucHermitte/ITK,hendradarwin/ITK,itkvideo/ITK,msmolens/ITK,jmerkow/ITK,hjmjohnson/ITK,spinicist/ITK,hjmjohnson/ITK,CapeDrew/DCMTK-ITK,jmerkow/ITK,hjmjohnson/ITK,atsnyder/ITK,spinicist/ITK,itkvideo/ITK,fuentesdt/InsightToolkit-dev,jcfr/ITK,ajjl/ITK,paulnovo/ITK,cpatrick/ITK-RemoteIO,BlueBrain/ITK,fuentesdt/InsightToolkit-dev,atsnyder/ITK,biotrump/ITK,fbudin69500/ITK,itkvideo/ITK,hinerm/ITK,jcfr/ITK,rhgong/itk-with-dom,fbudin69500/ITK,cpatrick/ITK-RemoteIO,stnava/ITK,InsightSoftwareConsortium/ITK,itkvideo/ITK,fuentesdt/InsightToolkit-dev,BlueBrain/ITK,BRAINSia/ITK,hinerm/ITK,CapeDrew/DCMTK-ITK,LucHermitte/ITK,rhgong/itk-with-dom