[Bug middle-end/81782] [7/8 Regression] Yet another -Wmaybe-uninitialized false positive with empty array

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81782

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah.

(gdb) p ref
$1 = {ref = <array_ref 0x7ffff689e188>, 
  base = <var_decl 0x7ffff7feee10 empty_array>, offset = 0, size = 8, 
  max_size = 0, ref_alias_set = -1, base_alias_set = -1, volatile_p = false}

Testing patch.