smartctl.cpp, os_win32/wmiquery.h: Add missing printf() format checks.

This also silences -Wformat-nonliteral warnings from clang++ 5.0.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk@4751 4ea69e1a-61f1-4043-bf83-b5c94c648137