CodeGen: Move an initialization away from an unrelated comment

An initialization somehow found its way in between a comment and the
block of code the comment is about. Moving the initialization makes
this less confusing.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193993 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed