math.fmod function that works as Mathematica/Matlab

[Dimiter 'malkia' Stanev <malkia@...>]

Hi guys,
	
	I was experimenting with this neat thing here, called Margarita (ahem 
not drinking it)
	http://playingwithmathematica.com/2011/06/17/friday-fun-6/#more-413

	And I think I found bug in math.fmod, or maybe not a bug, but different 
results than say Mathematica or Matlab. There is something in the lua 
doc saying that the versions takes care of negative numbers.

	Anyway this code makes it behave as Mathematica wants it too:

	function fmod(v, m)
	   if v < 0 then
	      return m - math.fmod(-v,m)
	   end
	   return math.fmod(v, m)
	end

	Not sure whether this is the right code, as it was tested only for 
positive 'm' (I have to fresh myself on the fmod function to tell better).

	Here is the code:
	https://github.com/malkia/ufo/blob/master/samples/margarita.lua

Thanks,
Dimiter "malkia" Stanev.