Eugene Zelenko 4e036ff575 Fix some Clang-tidy modernize warnings, other minor fixes.
Fixed warnings are: modernize-use-override, modernize-use-nullptr and modernize-redundant-void-arg.

Differential revision: http://reviews.llvm.org/D14312


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252087 91177308-0d34-0410-b5e6-96231b3b80d8
2015-11-04 22:32:32 +00:00
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