COMP: Silencing unused variable warning in itkTimeStamp
COMP: Silencing unused variable warning in itkTimeStamp

itkTimeStamp uses static initialization to initialize the global time stamp
used by all ITK objects. Some variables are used to run the initialization
but compilers consider that these variables are not used. Most compilers
can be silenced with:

(void)Variable

but ICC (Intel) prints the following warnings:

...itkTimeStamp.cxx(137): warning #593: variable "globalTimeStamp"\
 was set but never used
static GlobalTimeStampType * globalTimeStamp = GetGlobalTimeStamp();
                                 ^

...itkTimeStamp.cxx(37): warning #593: variable \
"<unnamed>::initializedGlobalTimeStamp" was set but never used
static ::itk::TimeStamp::GlobalTimeStampType * \
initializedGlobalTimeStamp = ::itk::TimeStamp::GetGlobalTimeStamp();

To silence all compilers, including ICC, we call a function that does
nothing with the "unused" variable.

Suggested-by: Bradley Lowekamp <blowekamp@mail.nih.gov>

Change-Id: Ic0c1f3033ec6c684a9b1d9c1358f6476fbe23005

thewtex/ITK,stnava/ITK,LucasGandel/ITK,Kitware/ITK,spinicist/ITK,LucasGandel/ITK,malaterre/ITK,richardbeare/ITK,thewtex/ITK,BRAINSia/ITK,BRAINSia/ITK,PlutoniumHeart/ITK,fbudin69500/ITK,vfonov/ITK,stnava/ITK,thewtex/ITK,stnava/ITK,vfonov/ITK,richardbeare/ITK,malaterre/ITK,richardbeare/ITK,vfonov/ITK,blowekamp/ITK,thewtex/ITK,thewtex/ITK,Kitware/ITK,Kitware/ITK,PlutoniumHeart/ITK,spinicist/ITK,malaterre/ITK,richardbeare/ITK,malaterre/ITK,vfonov/ITK,hjmjohnson/ITK,hjmjohnson/ITK,thewtex/ITK,InsightSoftwareConsortium/ITK,stnava/ITK,spinicist/ITK,stnava/ITK,PlutoniumHeart/ITK,hjmjohnson/ITK,vfonov/ITK,stnava/ITK,vfonov/ITK,LucasGandel/ITK,LucasGandel/ITK,BRAINSia/ITK,malaterre/ITK,LucasGandel/ITK,PlutoniumHeart/ITK,blowekamp/ITK,spinicist/ITK,InsightSoftwareConsortium/ITK,PlutoniumHeart/ITK,blowekamp/ITK,spinicist/ITK,richardbeare/ITK,PlutoniumHeart/ITK,malaterre/ITK,LucasGandel/ITK,malaterre/ITK,BRAINSia/ITK,BRAINSia/ITK,thewtex/ITK,spinicist/ITK,stnava/ITK,Kitware/ITK,blowekamp/ITK,fbudin69500/ITK,malaterre/ITK,Kitware/ITK,spinicist/ITK,Kitware/ITK,vfonov/ITK,PlutoniumHeart/ITK,fbudin69500/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,vfonov/ITK,blowekamp/ITK,LucasGandel/ITK,fbudin69500/ITK,vfonov/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK,stnava/ITK,hjmjohnson/ITK,PlutoniumHeart/ITK,hjmjohnson/ITK,BRAINSia/ITK,hjmjohnson/ITK,Kitware/ITK,blowekamp/ITK,blowekamp/ITK,malaterre/ITK,spinicist/ITK,stnava/ITK,richardbeare/ITK,spinicist/ITK,blowekamp/ITK,hjmjohnson/ITK,fbudin69500/ITK,fbudin69500/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,fbudin69500/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK