In emodules_load(), dereference f = dll_variable() once more. We then use EXTERNAL_TO_ITEXT on it, which returns an alloca'd string, so I delete the unneeded alloca copy statements. Fixes error reported by Anders Odberg, confirmed in <rfawrpfhm3l.fsf@fangorn.uio.no>.

This directory contains the source code for the architecture-dependent
files that go in ../arch-lib.  At present, these are mostly utility
programs used by Emacs.