[llvm] [Kaleidoscope] Fix ForExprAST::codegen (PR #88207)

[via llvm-commits]

https://github.com/Logikable requested changes to this pull request.

Great catch :) I made the same fix when doing the tutorial, so I was able to compare it with yours for correctness (yours is cleaner!)

I left a couple of ideas for things you could change. Thanks for contributing to the tutorial.

https://github.com/llvm/llvm-project/pull/88207