ofxDelaunay.h line 46 causes compilation error

[Jawabiscuit]

function does not return a value

[MartinBspheroid]

I had same problem with VS2012 and it seems like adding NULL after return fixes compiling error.

int ofxDelaunay::triangulate(){

if(vertices.size() < 3){
    return NULL;
}

seems to be a difference between gcc+ compiler and whatever compiler VS2012 uses. And for some reason, same piece of code is in every other fork of ofxDelaunay, so maybe it would be fine to propose fix in those too.