Keystrokes from a replayed macro aren't remapped

[tbroadley]

To reproduce:

1. Type something into Vim and go back to the start of the line
2. :Qwerty!
3. Record a simple macro, e.g. qarAlq
4. Replay the macro (@a) and note that it doesn't have the intended effect

My hypothesis is that Vim is respecting langmap while the macro is being recorded but not while it's being replayed.

I might take a crack at solving this issue tomorrow.