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Paul Eggert authored
This mostly undoes the previous change in this area. See: http://lists.gnu.org/archive/html/emacs-devel/2015-01/msg00570.html * alloc.c (allocate_pseudovector): * callint.c (Fcall_interactively): * dispnew.c (realloc_glyph_pool): * fringe.c (init_fringe): * lisp.h (memsetnil): * xdisp.c (init_iterator): Simplify by assuming that Qnil is zero, but verify the assumption. * lisp.h (NIL_IS_ZERO): Revert back to this symbol, removing NIL_IS_NONZERO. All uses changed.
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