Lua coroutines loses arguments when calling python functions.

[greatwolf]

The follow reproduces the problem:

py = require 'python'
pyprint = py.eval "print"
co = coroutine.create(function()
                        pyprint(math.sin)
                      end)
coroutine.resume(co)

That prints Lua nil on the python side instead of the function value of math.sin. Likewise when passing an empty table eg. pyprint({}, 1)}.

The problem is in LuaObject_New, it always uses the same global lua_State. This creates a problem when using coroutines since a different lua_State is used -- pushing arguments to the global state context is wrong in this scenario resulting in 'lost' parameters. Simple primitive types are fine but any non-trivial types like tables, functions, udata, other coroutines etc. that involves LuaObject_New during conversion will be affected by this bug.