COMP: Correct TEMPLATE_EXPLICIT definition in Path module
COMP: Correct TEMPLATE_EXPLICIT definition in Path module

Address compilation with VS9 2008 with static library. The declaration
of the explicit template with extern causes the following compilation
error:
itkParametricPath.cxx(34) : error C2960: 'itk::ParametricPath' :
inconsistent explicit instantiations, a previous explicit
instantiation specified 'extern template'

Change-Id: If85a4fb5f78f6a11e8be858ce541329d859dd4a1

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