8c61286797
PR go/68496
reflect: Allocate space for FFI functions returning a zero-sized type.
The libffi library does not understand zero-sized types. We represent
them as a struct with a single field of type void. If such a type is
returned from a function, libffi will copy 1 byte of data. Allocate
space for that byte, although we won't use it.
Fixes https://gcc.gnu.org/PR68496.
Reviewed-on: https://go-review.googlesource.com/17175
From-SVN: r230776
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README
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