[flang-commits] [flang] [flang] Fix seg fault `CodeGenAction::executeAction()` (PR #78269)

[Kareem Ergawy via flang-commits]

ergawy wrote:

Note that I came across this issue while testing:
```
flang-new -c -fopenmp target.f90
```

For this input:
```
subroutine omp_target_enter_nowait
   integer :: a(1024)
   !$omp target enter data map(to: a) nowait
end subroutine omp_target_enter_nowait

```

I am currently looking into this issue and will hopefully open a separate PR (cc @agozillon just FYI).

https://github.com/llvm/llvm-project/pull/78269