Changes

Don't use variadic macros for annotations

Varadic macros expect at least one parameter for the variadic part (at
least until C++20). They were used to allow for possible future
extension by adding more parameters.

    /Users/antonin/Tarides/ocaml/trunk/runtime/caml/memory.h:89:32: error: ISO C++11 requires at least one argument for the "..." in a variadic macro [-Werror]
       89 | CAMLmalloc(caml_stat_free, 1, 1) CAMLreturns_nonnull()
          |                                ^

Changes