Add Data:getFFIPointer. Similar to Data:getPointer but returns a cdata pointer directly (or nil if the FFI isn't available).

It should be preferred instead of Data:getPointer because the latter uses lightuserdata which can't store more all possible memory addresses on some new arm64 architectures, when LuaJIT is used.

src/modules/data/wrap_Data.h

@@ -29,6 +29,7 @@ namespace love
 namespace data
 {
 
+void luax_rundatawrapper(lua_State *L, const love::Type &type);
 Data *luax_checkdata(lua_State *L, int idx);
 int luaopen_data(lua_State *L);
 extern const luaL_Reg w_Data_functions[];