fix PR3764 - A redefinition of a pre-processor macro fails

Redefinition checking should ignore the leading whitespace and
start of line flags on the first token of an expansion.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66442 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed