devel/z88dk: try to unbreak the port's build against Clang 15

zxn.c:34:5: error: incompatible pointer to integer conversion
initializing 'int' with an expression of type 'void *'
[-Wint-conversion]

src/cpp/preproc.cpp:98:8: error: unqualified call to 'std::move'
[-Werror,-Wunqualified-std-cast-call]

Reported by: pkg-fallout