Fix a -Wuninitialized warning;  it's actually a false positive,
but it's not reasonable for the diagnostic to figure that out.
Pointed out by Benjamin Kramer.

Also clarify the logic here.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126017 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed