[parted-devel] mostly-clang-inspired clean-up

[Jim Meyering]

FYI, I've just pushed the following changes.

I ran the clang static analyzer (http://clang-analyzer.llvm.org/) on
parted recently, and finally got around to addressing the problems it
reported.  Meanwhile, I've also just build on an F12-alpha-based system,
which exposed new shadowing (link) warnings.

The most significant change here is this one:
  Subject: [PATCH 2/7] make PED_ASSERT handling sane: abort on false condition
See the description/justification in the commit log below.