[llvm-branch-commits] [FlowSensitive] [StatusOr] [9/N] Make sure all StatusOr are initialized (PR #163898)

[Florian Mayer via llvm-branch-commits]

https://github.com/fmayer created https://github.com/llvm/llvm-project/pull/163898

This is important if the first use of a StatusOr (or Status) is in a
conditional statement, we need a stable value for `ok` from outside of
the conditional statement to make sure we don't use a different variable
in every branch.