commit https://github.com/vim/vim/commit/4db20ab091330e460f08651d6052afd0536c507a Author: Bram Moolenaar <Bram@vim.org> Date: Mon Feb 22 21:48:30 2016 +0100 patch 7.4.1391 Problem: Warning for uninitialzed variable. Solution: Set it to zero. (Christian Brabandt)

" For Yiddish capitals should not be checked.  But only change the
" 'spellcapcheck' option when it is not at its default value.
let s:spc = &l:spc
setlocal spc&
if s:spc == &l:spc
  setlocal spc=
else
  let &l:spc = s:spc
endif
unlet s:spc