being a Double32_t (or any of the paramater's paramater, etc), we
do not export the GenerateInitInstance so that it does not conflict
with the GenerateInitInstance for the template instantiation with 'double'
as its parameter.


git-svn-id: http://root.cern.ch/svn/root/trunk@15537 27541ba8-7e3a-0410-8455-c3a389f83636