[PATCH] [clang-tidy] Add a checker for implicit bool conversion of a bool*.

[Benjamin Kramer]

Hi alexfh, djasper,

The goal is to find code like the example below, which is likely a typo
where someone meant to write "if (*b)".
bool *b = SomeFunction();
 if (b) {
   // b never dereferenced
 }

This checker naturally has a relatively high false positive rate so it
applies some heuristics to avoid cases where the pointer is checked for
nullptr before being written.

http://reviews.llvm.org/D4458

Files:
  clang-tidy/misc/BoolPointerImplicitConversion.cpp
  clang-tidy/misc/BoolPointerImplicitConversion.h
  clang-tidy/misc/CMakeLists.txt
  clang-tidy/misc/MiscTidyModule.cpp
  test/clang-tidy/misc-bool-pointer-implicit-conversion.cpp
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