Fix reloading a non-toplevel local module
Fix reloading a non-toplevel local module

When loading a nested local module, the loaded module was being
stored in the wrong place, so the next attempt to load the same
module would try to load it again from scratch, conflict, and
die with an assertion.

Reported by laser yuan.

alexey4petrov/reinteract,alexey4petrov/reinteract,alexey4petrov/reinteract