Text: prefix private member variables with underscore.
Text: prefix private member variables with underscore.

Fixes MSVC 2015 shadowing warning.

MiUishadow/magnum,MiUishadow/magnum,DerThorsten/magnum,DerThorsten/magnum,DerThorsten/magnum,DerThorsten/magnum,MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum,DerThorsten/magnum,MiUishadow/magnum