Eliminate shadowed variable warnings from gcc-7.2
Eliminate shadowed variable warnings from gcc-7.2

The gcc-7.2.0 compiler (and others) were giving shadowed variable warnings for this include file.  A simple renaming of a couple local variables eliminates the warnings.
cppformat/cppformat,alabuzhev/fmt,alabuzhev/fmt,cppformat/cppformat,alabuzhev/fmt,cppformat/cppformat