[llvm-commits] [PATCH] Fix a memory leak in OpaqueType (issue180073)

[collinwinter at google.com]

Reviewers: ,

Message:
Please take a look.

Description:
This fixes a memory leak found by Google's internal heapchecker.
LLVM/Clang tests pass.

Please review this at http://codereview.appspot.com/180073

Affected files:
   M     include/llvm/DerivedTypes.h
   M     lib/VMCore/LLVMContextImpl.h
   M     lib/VMCore/Type.cpp
   A     unittests/VMCore/DerivedTypesTest.cpp