Is there a function to return the PSPLua version

[Longshot]

Because new functions are added to each version of PSPLua, (and there are a few incompatabilities between Lua V20 and ealier versions) it would be good to have a function which returns the current Lua version.
Perhaps there is one, and Ive missed it. Or is there a work-around?

[TacticalPenguin]

To check if the functions you need are supported do something like:

if functionyouneedinordertorunyourprogram() == nil then
print("You need to update your luaplayer!")
end