lua_pushglobaltable return value

[Peter Melnichenko <mpeterval@...>]

Hello,

Lua manual for 5.3 says that lua_pushglobaltable returns void,
but in fact it returns int because it expands to lua_rawgeti which
was changed to return type of pushed value in Lua 5.3. IMO either
the manual should be updated or definition of lua_pushglobaltable
should be fixed to not return anything.

-- Peter