[CLEANUP] More code analysis

[unquietwiki]

I was checking out code on ZeroTier, which uses this adapter, and saw a few bugs come up there; they might be using an older version of this. Then I noticed here that @sgstair & @cron2 had posted some "code analysis fixes". I wasn't sure if what they fixed, had anything to do with what I found; but I have posted scans there & here. Not much to look at, thankfully.

Cppcheck 1.88 analysis, ran with cppcheck --enable=all --force --inconclusive . 2> ../../tapwin6-cppcheck.txt: tapwin6-cppcheck.txt