Double check pimCmdRedSum template behavior

[deyuan]

Need to double check below behavior:

In pimCmdRedSum class, the computeRegion is a virtual function:

virtual bool computeRegion(unsigned index) override;

In pimCmd.cpp file, this function takes a template data type:

template <typename T> bool
pimCmdRedSum<T>::computeRegion(unsigned index)

The pimCmd::computeAllRegions function does not pass any template data type to the virtual computeRegion function.