Fix index of calling function argument in lua

[Riyaaaaa]

Overview

Fixed a bug that the argument becomes illegal when binding SetObj to a member function with argument to lua.

Testcode

struct Foo {
void hoge(int a){}
}

sel::State state;
Foo foo;
state["foo"].SetObj(foo, "hoge", &Foo::hoge);
state("foo:hoge(1)"); // not works

output

[string "foo:hoge(1)"]:1: calling 'hoge' on bad self (number expected, got table),

Cause

_get_args function access sequentially from the bottom of the stack. So, the first argument is assigned 1 for index, but if SetObj is used, table 1 is allocated to index 1 instead of argument. As a result, _check_get function throws GetParameterFromLuaTypeError.

Solution

Access the stack from the top.

[rasikhq]

I had a similar issue, tried your changes but it still didn't work