Bug: Make possible to override LUA_32BITS as requested

[illwieckz]

Make possible to override LUA_32BITS, Lua itself raises an error message saying to override LUA_32BITS, so redefining it unconditionally it is a bug.

lua/luaconf.h:125:9: warning: 'LUA_32BITS' macro redefined [-Wmacro-redefined]
  125 | #define LUA_32BITS      0
      |         ^
<command line>:9:9: note: previous definition is here
    9 | #define LUA_32BITS 1
      |         ^
In file included from lua/lapi.c:17:
In file included from lua/lua.h:16:
lua/luaconf.h:572:2: error: "Compiler does not support 'long long'. Use option '-DLUA_32BITS'   or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
  572 | #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
      |  ^

[slipher]

Standard Lua uses 64-bit integers and double-precision (64-bit) floats, but you can also compile Lua so that it uses 32-bit integers and/or single-precision (32-bit) floats. The option with 32 bits for both integers and floats is particularly attractive for small machines and embedded systems. (See macro LUA_32BITS in file luaconf.h.)

-- https://www.lua.org/manual/5.3/manual.html

What's wrong with standard Lua? I don't think we want to do this.